________ she couldn’t understand was ________ fewer and fewer students showed interest in her lessons.
| A．What; why |
| B．That; what |
| C．What; because |
| D．Why; that |
10 .--- Do you like _____here?
---Oh, yes, the air, the weather and the way of life. Everything is so nice.
| A．this | B．there | C．that | D．It |
11 .He felt_____ to work for human rights and progress.
| A．it his duty | B．his duty | C．that is a duty | D．that is his duty |
12.It took us over an hour_______along the street.
| A．walk | B．to walk | C．walking | D．walked |
13.I think it a great honour_______to visit your country.
| A．to invite | B．inviting | C．having invited | D．to be invited |
14.Many people now make_________a rule to buy cards for their friends before Christmas.
| A．themselves | B．it | C．that | D．This |