Now people can with their friends far away by e–mail, cellphone or letter.
A. keep on B. keep in touch C. keep up
相关试题
There isinsect on the ground. The child is very interested in it.
| A．a | B．/ | C．the | D．an |
People have learned a lot from
studies．
| A．science | B．scientific |
| C．scientist | D．sightseeing |
The boy often got into
with the police.
| A．through | B．terrible |
| C．trouble | D．Trousers |
the cat before you leave.
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