1．[2010·全国大联考（新课标）]—You didn’t invite Mary to the ball?
—____ her, too?
A．Must I invite B．Should I have invited
C．Must I have invited D．Should I invite
1B考查情态动词的用法。“should have done sth．”结构表示“本该做但事实上并未做某事”。另外注意第一句的陈述语序后面用问号表示疑问的语气，意思是“难道你 …？”
2. [2010·陕西西工大附中6次训练]_____ it rain tomorrow, we would have to _______ the picnic.
A. Would; put forward B. Should; call off
C. Will; give up D. Should; put up
