It is politely requested by the hotel manager that radios __________ after 11 o'clock at night.
| A．were not played |
| B．not be played |
| C．not to play |
| D．did not play |
Living things are dying out quickly. Let’s ask ____ destroying them in the past years.
| A．what part people have been playing |
| B．people have played in |
| C．what part people have played in |
| D．people have been playing what part |
____ that I’m feeling all right, my brain is also beginning to work much better.
| A．For | B．Now | C．Since | D．Despite |
The changes in our chemistry lab will cost quite a lot, ____ they will save us money in the long run.
| A．or | B．since | C．for | D．but |
The workers were making so much noise in the workshop, and the boss hurriedly went to see ____.
| A．what the matter was | B．what was the wrong |
| C．what wrong was | D．what was the matter |
This is certainly the case, but ____ it is a mistake or not I don’t know.
| A．if | B．even though | C．whether | D．that |