1. I don’t know if it ___ tomorrow ,if it ___ , we won’t go on a picnic. A. rains; rains B. will rain; rains C. will rain; will rain 2. We can’t go to the zoo ___ the weather is fine tomorrow. A. unless B. if C. because 3. Just work hard, ____ your dream will come true. A. but B. and C. or 4. Don’t cross the street ____ the traffic lights are green. A. after B. until C. when 5. ____ they may not succeed, they will try their best. A. Though B. Because C. Unless 6. We will have no water to dink we don’t protect the earth.A. until B. before C. if 7. Luckily, all the students got out of the teaching building ___ if fell down. A. until B. before C. after 8. My grandma didn’t go sleep ___ I got back home. A. where B. until C. as soon as 9. Uncle Wang gave all his savings to the Hope School ______he himself was not rich.A. because B. as if C. though 10.You’ll do better ___you are more careful with your spelling. A .if B. before C. although 11.The sports meeting will continue___ it rains this afternoon. A. if B. since C. unless 12.I’ll give her the message___she comes back. A. till B. before C. as soon as 13.Jim is going to be a doctor when he _______ . A. will grow up B. grows up C. grow up 14.—Did you catch what the teacher said? —No. She spoke so fast I couldn’t hear her very clearly. A .which B. that C. when 15.The teacher speaks very loudly ___ all the students can hear her. A. so that B. because C. since 16. Study hard, _______ you will catch up with your classmates. A. and B. or C. but 17. Several days has passed _________ the terrible earthquake happened in Japan. A. after B. since C. as 18. It’s raining outside. Don’t leave _...
