备考2019年高考英语一轮复习04：连词
年级： 学科： 类型： 来源：91题库
一、单选题（共40小题）
1、 ______ scientists have learned a lot about the universe, there is much we still don't know.
A . Once
B . Since
C . Though
D . Unless
2、You won't find paper cutting difficult _____you keep practicing it.
A . even if
B . as long as
C . as if
D . ever since
3、____ the damage is done, it will take many years for the farmland to recover.
A . Until
B . Unless
C . Once
D . Although
4、It is so cold that you can't go outside _____ fully covered in thick clothes.
A . if
B . unless
C . once
D . when
5、 _____ the students came from different countries, they got along quite well in the summer camp.
A . While
B . Unless
C . Since
D . Until
6、My grandfather still plays tennis now and then, he's in his nineties.
A . as long as
B . as if
C . even though
D . in case
7、I really enjoy listening to music ___ it helps me relax and takes my mind away from other cares of the day.
A . because
B . before
C . unless
D . until
8、I am not afraid of tomorrow, ______ I have seen yesterday and I love today.
A . so
B . and
C . for
D . but
9、_______online shopping has changed our life, not all of its effects have been positive.
A . Since
B . After
C . While
D . Unless
10、______ the average age of the population increases, there are more and more old people to care for.
A . Unless
B . Until
C . As
D . While
11、______some people are motivated by a need for success, others are motivated by a fear of failure.
A . Because
B . If
C . Unless
D . While
12、Everyone in the tourist industry has made the point that __________ Government assistance is helpful, what they actually need most is for the visitors themselves to return.
A . as
B . when
C . while
D . since
13、Backward somewhat technologically ________ we are for the moment, we have confidence in our ability to catch up in time.
A . although
B . if
C . as
D . once
14、—Peter, please send us postcards ______ we'll know where you have visited.
—No problem.
A . but
B . or
C . for
D . so
15、______ birds use their feathers for flight, some of their feathers are for other purposes.
A . Once
B . If
C . Although
D . Because
16、If you don't understand something, you may research, study, and talk to other people _______ you figure it out.
A . because
B . though
C . until
D . since
17、_____ he once felt like giving up, he now has the determination to push further and keep on going.
A . Where
B . As
C . In case
D . Now that
18、He is a shy man，___he is not afraid of anything or anyone.
A . so
B . but
C . or
D . as
19、You won't find paper cutting difficult _____you keep practicing it.
A . even if
B . as long as
C . as if
D . ever since
20、_____the damage is done, it will take many years for the farmland to recover.
A . Until
B . Unless
C . Once
D . Although
21、It is so cold that you can't go outside_____ fully covered in thick clothes.
A . if
B . unless
C . once
D . when
22、I believe you will have a wonderful time here you get to know everyone else.
A . though
B . as if
C . once
D . so that
23、There is only one more day to go your favorite music group play live.
A . since
B . until
C . when
D . before
24、We need to get to the root of the problem ________ we can solve it.
A . while
B . after
C . before
D . as
25、 a single world can change the meaning of a sentence, a single sentence can change the meaning of a paragraph.
A . Just as
B . Even though
C . Until
D . Unless
26、_____ I make a promise to help others, I will manage to complete it.
A . Although
B . Once
C . Unless
D . Before
27、Some parents can't afford enough time with their children ______they want to.
A . as if
B . even if
C . because
D . before
28、— Don't look down upon Bob. He has his own advantages.
—Oh, yes others are weak, he is strong.
A . Before
B . When
C . Where
D . Though
29、Work _______ they might, they didn't get the result they expected.
A . although
B . since
C . as
D . as though
30、— How can I wake up so early?
—Set the alarm at 5:00 am., you will make it.
A . and
B . but
C . or
D . so
31、—Why do you drink so much coffee?
—Well, it doesn't keep me awake in the night, I see no harm in it.
A . when
B . as long as
C . as though
D . while
32、—Excuse me, sir. Can you spare me a dollar _________ I can buy this book?
—Sure, no problem.
A . for
B . so
C . but
D . or
33、________some people criticize graffiti for being ugly and destructive, those graffiti lovers still see it as real art.
A . As
B . While
C . Once
D . Until
34、She doesn't speak our language, she seems to understand what we say.
A . yet
B . and
C . or
D . so
35、_________ we don't stop climate change, many animals and plants in the world will be gone.
A . Although
B . While
C . If
D . Until
36、_______ you can sleep well, you will lose the ability to focus, plan and stay motivated after one or two nights.
A . Once
B . Unless
C . If
D . When
37、The book is now out of print, ______ it can easily be borrowed from libraries.
A . and
B . for
C . so
D . but
38、Sometimes tests are needed ______ doctors discover exactly what's wrong with your body.
A . since
B . before
C . although
D . if
39、I think Tom will make a good monitor, I'd like to vote for him.
A . but
B . for
C . or
D . so
40、_______ you consider that the airline handled 80 million passengers last year, the accident figures are really very small.
A . Unless
B . When
C . Before
D . Though