I don’t think the number of people _______ this happens is very large.
| A．whom | B．to whom | C．on whom | D．which |
Unlike watching TV, reading is a highly active process _______ it requires attention as well as memory and imagination.
| A．until | B．but | C．unless | D．for |
---- Don't you think it necessary that he _______ to Miami but to New York?
---- I agree, but the problem is ________ he has refused to.
| A．will not be sent; that | B．not be sent; that |
| C．should not be sent; what | D．should not send; what |
The place _______ the bridge is supposed to be built should be ________ the cross-river traffic is the heaviest.
| A．which; where | B．at which; which |
| C．at which; where | D．which; in which |
---- The woman biologist stayed in Africa studying wild animals for 13 years before she returned.
---- Oh, dear! She _______ a lot of difficulties!
| A．may go through | B．might go through |
| C．ought to have gone through | D．must have gone through |
In our childhood, we were often _______ by Grandma to pay attention to our table manners.
| A．demanded | B．reminded | C．allowed | D．hoped |