My uncle’s house in the downtown area is much smaller than ours , but it is twice _______ expensive . 
| A．as | B．so | C．too | D．very |
I can’t bear ____, so I hope you can come on time.
| A．to keep waiting | B．to keep to wait |
| C．being kept waiting | D．being kept to wait |
I wonder such a gentleman as he should ____ an error, though it is a simple and small one.
| A．admit | B．tolerate | C．commit | D．ignore |
A study shows that students living in non-smoking dormitories are less likely to ____ the habit of smoking.
| A．make up | B．turn up | C．draw up | D．pick up |
____ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.
| A．While | B．As | C．Because | D．If |
–Where are the students? How could they keep us waiting for so long?
–They started an hour ago and they ____ be here in fifteen minutes, I think.
| A．can | B．would | C．should | D．must |