—It’s so late. Our son ___ be back!
—Don’t worry. I dare say he ___ have some extra work to do.
| A．can; must | B．will; might | C．should; must | D．must; may |
So __ _ that all the living things died out gradually .
| A．serious polluted the lake is | B．serious polluted is the lake |
| C．seriously polluted the lake is | D．seriously polluted is the lake |
After the Shenzhou VI capsule (太空舱 ) touched down, two astronauts succeeded in traveling around the earth, thus again __________ China is a global space power.
| A．proving | B．to prove | C．to have proved | D．being proved |
---Thanks for your trouble.
---Not at all. I’m ___________ pleased to help you.
| A．too much | B．too only | C．so much | D．only too |
Jim was not _________ to the club, because at that time he was not a member of it.
| A．allowed | B．permitted | C．admitted | D．promoted |
The government has taken some measures to solve the shortage of electricity, but it may be some time _________ the situation improves.
| A．since | B．when | C．unless | D．before |