--- Catherine, I have cleaned the room for you.
---Thanks. You _______ it. I could manage it myself.
| A．needn’t do | B．shouldn’t have done | C．mustn’t do | D．needn’t have done |
---- Have you finished your composition already?---- Yes．I _____ it in less than ten minutes.
| A．have finished | B．finished | C．will finish | D．had finished |
The driver was at _______ loss when ________word came that he was forbidden to drive for speeding．
| A．a; the | B．/；/ | C．the; the | D．a；/ |
Of the two, I would prefercamera, which is very easy for me to carry.
| A．a small | B．a smaller | C．the small | D．the smaller |
—What’s wrong with him?
—The picture he came acrosshis memory of a sad story in his childhood.
| A．put off | B．took off | C．set off． | D．gave off |
A brillia
nt idea occurred to him, ______ to his research in the lab.
| A．while devoting | B．while devoting himself |
| C．while he was devoted | D．while devoted |