What ____ you ______ at this time yesterday?
| A．did ; do | B．is; doing | C．were; doing | D．are ; doing |
He is very happy , because he _____ in a big apartment next year.
| A．live | B．lives | C．will live | D．will living |
—How many birds can you see in the trees?
—I can see _________ birds in them.
| A．hundreds of | B．five hundreds |
| C．hundred of | D．five hundreds of |
A dog robot could help ____ the room.
| A．cleaning | B．getting | C．clean | D．get |
—Where is Miss Wang?
—She went to Hainan Island last week and will return _________ six days.
| A．ago | B．later | C．behind | D．in |
There will be ____ cars and ____ pollution twenty years later.
| A．many, few | B．little, few |
| C．less, more | D．fewer, less |