I ______ her, but I never could.
| A．ought to help | B．must help | C．must have helped | D．ought to have helped |
Not until I dropped off from school ____ how much time I had wasted.
| A．didn't I realize | B．I realized | C．I didn't realize | D．did I realize |
The room ______ 10 meters across is large enough for a single man ______ .
| A．measuring; to live in | B．measures; to live |
| C．measuring; to live | D．measured; to live in |
This is the girl ______ father was just spoken by us.
| A．whose | B．of whom | C．of whose | D．to whom |
There are some health problems that, when ______ in time, can become bigger ones later on.
| A．not treated | B．not being treated | C．not to be treated | D．not having been treated |
He commanded that all the gates ________．
| A．should shut | B．would be shut | C．shut | D．be shut |