题目内容：

根据句意用所给词的适当形式填空。（每空一词 4分）

1.It is ________( use ) to talk to him like that. He won’t listen to you.

2.Please mix the red ___________(strawberry),green pears, purple grapes and oranges together.

3.Today it's becoming more and more important for students to learn to teach _______.(they)

4.The boy is more than 2 meters in ____________(high) and he is good at playing basketball.