What ______ you ______ when you father came back?
| A．did, do | B．are, doing | C．were, doing | D．do, do |
—_____ you _____ your homework yet?
—Yes, I _____ it ten minutes ago.
| A．Did ; do; finished | B．Have; done; have finished |
| C．Have; done; finished | D．Will; do; finish |
It’s necessary for you _____ exercise every day.
| A．taking | B．to take | C．take | D．takes |
—Could you tell me _____?
—Sorry, I don’t know.
| A．where are my socks | B．where can I find my socks |
| C．where my socks are | D．where my socks put |
The supermarket provides customers _____ plastic bags for free.
| A．on | B．with | C．of | D．in |
—Is it interesting to play computer games?
—Yes, _____ you are interested in playing computer games, you’ll have trouble giving it up.
| A．once | B．twice | C．as | D．as soon as |