---Do you mind if I keep pets in this building?
---_________
| A．I'd rather you didn't, actually. |
| B．Of course not. It's not allowed here. |
| C．Great! I love pets. |
| D．No, you can't. |
The villagers have already known _________ we’ll do is to rebuild the bridge.
| A．this |
| B．that |
| C．what |
| D．which |
The development of industry has been ________ gradual process throughout ________ human existence, from stone tools to modern technology.
| A．/; the |
| B．the; a |
| C．a; / |
| D．a; a |
—What shall we do tonight then?
—_______ -whatever you want.
| A．Help yourself |
| B．It’s a deal |
| C．No problem |
| D．It’s up to you |
It suddenly occurred to him ________ he had left his keys in the office.
| A．whether |
| B．where |
| C．which |
| D．that |
It was a real race ________ time to get the project done. Luckily, we made it.
| A．over |
| B．by |
| C．for |
| D．against |