－Why does the river smell terrible?
－Because large quantities of water______．
| A．have been polluted | B．is being polluted |
| C．has been polluted | D．have polluted |
Bocai Middle School, which is reported just two years ago, is now reowned throughout Hunan Province.
| A．having established | B．to be established |
| C．being established | D．to have been established |
——Did Jack come back early last night?
——Yes. It was not yet eight o’clock _______ he arrived home.
| A．before | B．when | C．that | D．until |
——I ran into the back of a truck yesterday and damaged my car badly.
——I suppose you_______too fast.
| A．had driven | B．drove | C．have driven | D．were driving |
My aunt sang a few old songs, my uncle _______ the piano to accompany her..
| A．played | B．to play | C．playing | D．play |
——May I use your dictionary? I want to consult it..
—— _______ . It’s over there.
| A．Feel free | B．Got it | C．No problem | D．It depends |