He _______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.
| A．wouldn’t |
| B．shouldn’t |
| C．couldn’t |
| D．mustn’t |
－Where have you been all day?
－I ______some former classmates and I couldn't get back until it was dark．
| A．have met | B．would meet | C．met | D．had met |
－He is eager to try something he has never tried before．
－Oh,I see．That，s ______he's different from others．
| A．when | B．what | C．how | D．where |
As your teacher,I could not have you______away with cheating in the exam．
| A．get | B．getting | C．breaking | D．break |
Going abroad to study requires a big adjustment and it usually takes a while to ______．
| A．calm down | B．fit iri | C．keep up | D．cheer up |
Failure can make a positive contribution to your life______you leam to use it．
| A．since | B．unless | C．until | D．once |