On April 14, 2010, a serious earthquake happened in Yushu. More than 2,000 people ______ in it.
We need to come up with an _____________ and make a decision at once.
We'll see an even stronger China in ____________ future.
—Could you tell me __________? —Sorry, I don’t know.
I don’t know if it ________ tomorrow. If it _________ , we won’t go hiking.
-I hear you ________ the USA. When ________ you go there? -Last summer holiday. A. have been to; did B. have gone to; will C. have been to; do D. have gone; did