句意填词
1.You look unhappy.What_____________ to you?
2.No one ________ Yang Liwei in China has ever flown around the earth.
3.My parents and I often play cards for_________ on weekends.
4.T he old man lost his leg in a car_____________.
5.Some terrorists ____________ the World Trade Center on September 11,2001.
6.Did you find your book?Sorry,I can’t find it ___________.
7._______________ often happen in Japan.