She felt_______at the_______situation.
| A.embarrassed; embarrassing | 
| B.embarrassing; embarrassing | 
| C.embarrassing; embarrassed | 
| D.embarrassed; embarrassed | 
Here is so difficult a problem_______none of us can solve.
| A.which | 
| B.that | 
| C.as | 
| D.what | 
Is this museum _______ we visited last week?
| A.the one | 
| B.that | 
| C.where | 
| D.in which | 
It is not a serious illness. So I guess she will_______soon.
| A.remove | 
| B.recover | 
| C.replace | 
| D.reduce | 
We never dared to ask him a question, _______ ?
| A.did we | 
| B.didn’t we | 
| C.dared we | 
| D.daren’t we |