—This physics problem is too difficult. Can you show me _____, Wang Li?—Sure.A. what to work it outB. what to work out itC. how to work it out
--Do you have ________to tell me ? --No. That’s only________ I want to say.
Not only the two computer programmers but also their boss ______the murder.
--______great fun we had at the party last night! --Yes, It was _________exciting a party that I would never forget it.
We feel ______our duty to make our country stronger and stronger.
--The air pollution is terrible. --It will be worse_______ we take action to protect the environment.