问题
Not only China but also other countries _____trying to develop their own economy.[ ]
A: is
B: are
C: has
D: be
B: are
C: has
D: be
正确答案是：
同类题型
With so many forms _______, many students feel at a loss before the 2010 college entrance exam.
I wouldn’t marry Pat even if she ______ thelast woman on earth
Shall we go to the cinema this evening?— Sorry, I can’t. I’m ___ my mum at the airport at7:00.[ ]
Would it be ____for you to pick me up at four o’clock and take me to the airport?