--- Why does the lake smell terrible?
---Because large quantities of water .
| A．have polluted | B．is being polluted |
| C．have been polluted | D．has been polluted |
_______youwanttochangeforasingleroom,you’llhavetowait for a while.
| A．While | B．Although | C．Until | D．If |
Mo Yan, _______ won the 2012 Nobel Prize for literature, has received worldwide praise.
| A．which | B．whose | C．that | D．who |
— I’m going to Hong Kong for holiday next week.
— _______.
| A．My pleasure | B．Good luck | C．Have fun | D．Best wishes |
I would like to buy an apartment, large, comfortable and , easy to work by bus.
| A．in all | B．after all | C．first of all | D．above all |
We hung a net round the bed, which could protect us _____ mosquitoes and other insects.
| A．from | B．by | C．off | D．under |