The little girl was crying because her mother didn’t allow her _______ the ice-cream.
Tu Youyou is famous ____ her medical research and won the Nobel Prize this year.
-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.