The short-answer test is a kind of____between the composition and selection types.
| A．mixture | B．collection | C．compound | D．compromise |
___ most of the earth’s surface is covered by water, fresh water is very rare and precious.
| A．As | B．Once | C．If | D．Although |
Some experts think that language learning is much ___ for children as their tongues are more flexible.
| A．easy | B．easier | C．easily | D．more easily |
The parents suggested ___ in the hotel room but their kids were anxious to camp out
during the trip .
| A．sleep | B．to sleep | C．sleeping | D．having slept |
We ___ our new neighbors yet, so we don't know their names.
| A．don't meet | B．won't meet | C．haven't met | D．hadn't met |
Both sides have accused of breaking the contract ___.
| A．another | B．the other | C．neither | D．each |