The world's population problem will be serious all the countries do something to control it. [

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• — What happened to Tom? — He was crossing the street ____ a motorbike hit him from behind. [ ]A. whi
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• —It's one o'clock now. I must go. —It's raining outside. Don't leaveit stops. [
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• The scientists told us _______ about three days from Earth to the moon by spaceship. [ ]A. whether i
• Nobody could fly ________ the Wright brothers made the first flyer. [ ]A. after B. before C. though
• My grandma didn't go to sleep _____I got back home. [ ]A. where B. until C. as soon as D. while
• — Will you be back ____ five in the afternoon? — I'm not sure, maybe later than that. [ ]A. in
• Bring it nearer _____ I may see it better. [ ]A. although B. even though C. so that D. since -九年级英语
• Susan will not arrive at the airport on time _____ she hurries up.[ ]A. once B. if C. whenD. unless
• _____ Sandy was playing the piano, someone knocked at the door.[ ]A: While B: Before C: After D: Unt
• Some people won't realize the importance of their health _______ they have lost it. [ ]A. after
• You won't pass the PE test _______ you exercise much harder than usual. [ ]A. if B. unless C. w
• The entrance exam is only fifteen days away from now. You will fail the exam ______ you study hard f
• —Where is the comic book? —I brought it to you _______ you were in the reading room yesterday. [ ]A.
• They didn't start the work _______ their teacher came back. [ ]A. until B. while C. as soon asD
• Is Tom at school today? No, He's at home ______ he has a bad cold. [ ]A. because B. if C. until
• ______ they are twin sisters, they don't look like each other. [ ]A. Because B. Since C. Though
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• ____ Mr. Zhang gave us some good suggestions, we still didn't deal with those problems very wel
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• My father was so tired that he fell asleep he went to bed. [ ]A. as if B. even though C. ever since
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• I am cooking _______ they are setting the table. [ ]A. but B. then C. because D. while -九年级英语
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• We'd better hurry ______ it is getting dark. [ ]A. and B. but C. as D. unless -九年级英语
• You'll miss the train ______ you hurry up. [ ]A. unless B. as C. if D. until -九年级英语
• She asked _____ we were getting on well with our work. [ ]A. howB. if C. whatD. that -九年级英语
• The girl had a short rest and did her homework _____ she reached home.[ ]A. after B. before C. when
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• ______ he is five years old, ______ he swims as well as his father. [ ]A. Because, so B. Because, /
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• the sun was shining,it wasn't very warm. [ ]A. Although; / B. Because; / C. Even; /D. Although;
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• The skirt still looks pretty on you, it is kind of out of style. [ ]A. thoughB. becauseC. for D. as
• The teacher asked the students . [ ]A. when was Albert Einstein born B. what they will do with the c
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• You can't go fishing with Dad ______ you finish your homework. [ ]A. because B. after C. while