We visited Beijing University _______ the first day of our trip.
| A．in | B．at | C．on | D．of |
In our class _____ of the students _____boys.
| A．third fifths; is | B．third fifth; are | C．three fifth; is | D．three fifths; are |
—_____ 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 |