We ______ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
The man moved forward and looked over the edge (边缘), shrinking his shoulders.
| A．accurately | B．cautiously |
| C．positively | D．particularly |
When life lets you down and when it seems that your world is ______, take courage and go the next step.
| A．at an end | B．on end |
| C．by the end | D．in the end |
As is known to all language learners, the newly learnt words will soon be forgotten unless ______ used in everyday communication.
| A．gradually | B．loosely |
| C．exactly | D．frequently |
Since you have missed such a good chance, don’t think about it any more. It’s ______ crying over spilt milk.
| A．useless | B．important |
| C．reasonable | D．necessary |
The proverb “Seeing a thing for oneself is better than hearing about it” means that secondhand experience is less ______ than firsthand experience, which is perfectly true.
| A．available | B．reasonable |
| C．reliable | D．unbelievable |