1. Diana isn’t here, _______ leave a message on her desk. A. or B. so D. and D. but2. _______ Lin Feng has to work late, she always wears a smile on her face. A. Because B. If C. Until D. Though3. The left-behind kids(留守儿童)can’t see their parents_______ the parents come back home from work. A. but B. until C. or D. if4. Eric arrived on time, _______ it was the rush hour. A. although B. because C. while D. unless5. It’s going to rain. You’d better take an umbrella _______ you may get wet. A. or B. and C. but6. Talk to your teacher and you will get help _______ you have a problem.A. unless B. if C. until D. so7. They will lose the game _______ they try their best.A. unless B. once C. since D. after8. He’s not a perfect child. He sometimes talks back _______ his parents talk with him. A. if B. before C. when D. until9. Don’t run in the classroom, _______ you may hurt yourself. A. and B. or C. but D. so10. -Shall we go for a picnic in the forest park tomorrow? - Yes, _______it rains heavily. A. if B. unless C. until D. when11. He didn’t go to school yesterday _______ he was ill. A. because B. because of C. if D. so12. I’d like to go with you, _______I’m too busy.A. or B. and C. so D. but13. I’d like to have a try, _______ I may fail.A. since B. though C. until D. after14. Father won’t allow me to play outside_______ I wash up the dishes. A. if not B. if C. unless D. because15. Read this article, _______you will understand that not everything can be bought with money.A. or B. and C. but D. so16. Laura opened the door and rushed into the rain _______ I could stop her. A. until B. after C. before D. unless17. _______ he was very tired, ...
