---Helen, will you be at the party tonight?
---Yes, but I have so much homework to do that I really__________.
| A．can’t | B．mustn’t | C．won’t | D．shouldn’t |
If you want to visit the museum, I recommend ___________ there by underground.
| A．you to go | B．going | C．you went | D．to going |
He is going into hospital to have a small __________ her knee.
| A．operate on | B．operation for | C．operation to | D．operation on |
___ in experience, she didn’t manage to pass the interview.
| A．Lack | B．Lack of | C．For lack of | D．Lacking |
Stress can be extremely damaging to your health. Exercise, _, can reduce its effects.
| A．at the same time | B．while | C．though | D．meanwhile |
In the meantime, the question facing business is whether such research is ______ the costs.
| A．worth | B．worth of | C．worthy | D．worthwhile |