_____ he is only 4 years old,he is able to play the piano very well.
It’s important to eat a _____ diet.
–Excuse me, _____ ?--It’s windy.
--_____ with you? --I have a score throat.
–Excuse me, Mr. He, are you free? Lin Tao and I want to tell you _____. –Sure.
He is finishing _____ a funny story. And he is thinking about _____ to Beijing for a vacation.