---Is that Jack speaking?
---Sorry, he _______ in. He _______ back in half an hour.
| A．isn’t; will be | B．wasn’t; will | C．isn’t; is | D．wasn’t; was |
Mrs. Green warned us ______ more water because of the hot weather.
| A．drinking | B．to drink |
| C．to drinking | D．drink |
Look at those students. ______ hard-working they are!
| A．What | B．What a | C．How | D．How a |
Our teacher told us that the sun ______ the earth light.
| A．gave | B．will give |
| C．has given | D．gives |
If you ask him _____, he will be happy to help you.
| A．politely | B．quickly |
| C．loudly | D．normally |
We all know travel can ______ our knowledge of the world.
| A．discover | B．develop |
| C．increase | D．review |