.It is uncertain whether the medicine will work on the this cold,________？
A, is it B. isn't it C, will it D. won't it
Great attention must be paid ____ welfare, especially in the poor area.
| A．develop | B．to develop |
| C．to developing | D．developing |
----Your mother becomes more and more forgetful.
----Yes. She searched for her cellphone for a whole day last Sunday but it ______ in her coat pocket the next day.
| A．turned out | B．turned on |
| C．turned over | D．turned up |
----I stayed at a hotel while in New York.
----Oh, did you? You ______with Barbara.
| A．must have stayed | B．could have stayed |
| C．might have done | D．ought have done |
You should have passed the examination. Why didn’t you do our teacher suggested?
| A．if | B．as |
| C．when | D．because |
My brother wants to work in the factory which ____ still .
| A．is; building | B．has; been built |
| C．is; being built | D．is; to be built |