— So hard ______ in the past few months that he has made great progress in English.
— I can see that; only a few mistakes ______ in the exam.
| A．has he worked; did he make |
| B．he has worked; did he made |
| C．he has worked; he made |
| D．has he worked; he made |
9．_____ makes this shop different is that it offers more personal services.
| A．What | B．Who | C．Whatever | D．Whoever |
8．Although this_______ sound like a simple task, great care is needed.
| A．must | B．may | C．shall | D．Should |
7．Please ______ your sister to bring the ticket for the concert.
| A．remind | B．remember | C．warn | D．Let |
6．Be careful! The slightest spark（火花）could ______ the fireworks.
| A．set about | B．set off | C．set out | D．set up |
5．The police are offering a $ 60,000 _____ for information about the killer.
| A．price | B．prize | C．award | D．Reward |