In the after-class activities，the students had plenty of_________and gained a lot of practical _________.
| A．experience;experiences |
| B．practices;experience |
| C．practice;experience |
| D．exercise;knowledges |
This is____ a difficult problem ____ all of us can't work it out.
| A．such; that | B．so; that | C．such; as | D．so; as |
Only when ____in the afternoon _____able to leave.
| A．the match was over; they were | B．was the match over; were they |
| C．was the match over; they were | D．the match was over; were they |
---- I usually take a walk at night.
---- ___ do that.
| A．Better not | B．You'd better not to | C．You hadn't better | D．Best not to |
Look at the trouble I am in! If only I ____your advice．
| A．followed | B．would follow | C．had followed | D．should follow |
On the closet _____ a pair of trousers his parents bought for his birthday.
| A．lying | B．lies | C．lie | D．is laid |