—Why do you ____ very happy this afternoon?—Because we are going to spend the evening at Lily’s house.
-Is everyone here today? -No, Jack is at home____ he is ill.
You should take____ umbrella if it rains.
--Alice, you got an A in this science exam.---__________________.You know I am not good at it.
I think Hainan is one of ___________in China.
It’s really nice of you ________me with Chinese problem