题目内容：

根据句意，用括号中所给词的适当形式填空。并将答案写在答题卷相应位置上。

1.He always makes me ________ when I am sad. (laugh)

2.Some        from the USA went to visit Yunnan History Museum. (tour)

3.The sea is big on the earth , but the sky is      than the sea.(big)

4.Maybe I can’t go swimming with you. I have a      . I have to see a dentist. (tooth)

5.The number of the students in our school      3000 this year. (be)