The conference has been held to discuss the effects of tourism ______ the wildlife in 
the area.
| A．in | B．on | C．at | D．with |
As we all know, the director as well as the workers ______ responsible for the protection of the old buildings.
| A．were | B．are | C．is | D．was |
The manager came over and asked the customer how____
| A．did the quarrel came about |
| B．the quarrel had come about |
| C．had the quarrel come about |
| D．had the quarrel come about |
______he does has nothing to do with me.
| A．whatever | B．No matter what | C．That | D．If |
—Do you think you will be able to finish your writing by five o’clock today?
—________. I’ll be busy with experients all day.
| A．Not a chance | B．No doubt |
| C．No wonder | D．Not to mention it |
A recent survey shows that the question ________ New Year’s Eve should be included in the three-day New Year’s holiday caused heated discussion among the Internet users.
| A．that | B．how | C．where | D．whether |