| How can you expect him to make any progress _____ you never give him a chance to have a try? |
A. when B. unless C. even though D. until |
| Only the factory ____ yesterday ____ this kind of machines. |
A. did we visit; does it produce B. did we visit; produces C. we visited; produces D. we visited; does it produce |
| Our game of basketball _____. We had been playing for about half an hour when it started to rain heavily. |
A. has interrupted B. had interrupted C. was interrupted D. had been interrupted |
| Why not get some work experience first _____ go straight on to university? |
A. rather than B. or rather C. other than D. more than |
| A dozen ideas were considered _____ the architect decided on the design of the building. |
A. before B. because C. whether D. unless |
| —We could have asked Miss Keller for help. She is always kind-hearted. —Yes. A whole day ____. |
A. will waste B. had wasted C. was wasted D. would be wasted |
| If _____, we will meet at half past seven tomorrow evening to discuss the matter. |
A. you are convenient B. you will be convenient C. it is convenient for you D. it will be convenient for you |
| He made a quick _____ from an unfriendly to a friendly manner when he saw that we could help him. |
A. decision B. preparation C. switch D. difference |