________ is known to all is that effective measures should be taken to deal with the problem of the overexploitation of our resources.
| A．What | B．It |
| C．As | D．Which |
It was _____ opportunity to miss.
| A．too good an | B．a too good |
| C．too a good | D．too good |
The lift in that tall building went wrong and got trapped _____ floors. People in it had no way to get out.
| A．in | B．between |
| C．among | D．on |
-----“How long have you stayed in this hotel?”
----- “Not long, just ______ this Monday.”
| A．on | B．since |
| C．until | D．after |
So far, several ships have been reported missing _______ the coast of Bermuda Island.
| A．off | B．along |
| C．on | D．around |
It used to be thought _____ the Earth was flat.
| A．as | B．when |
| C．since | D．that |