根据句意，用括号内所给词的适当形式填空。

1.After so many ________ (year) practice, Li Na is a well-known tennis player.

2.We’ll have a surprise party for my mother’s ________ (forty) birthday next Saturday.

3.The higher the mountain is, the ________ (thin) the air is.

4.To tell the ________ (true), I don’t like the drinks in that café.

5.It’s a (an) ________ (usual) experience, few people have chances to do it.

根据句意，用括号内所给词的适当形式填空。

91. After so many ________ (year) practice, Li Na is a well-known tennis player.

92. We’ll have a surprise party for my mother’s ________ (forty) birthday next Saturday.

93. The higher the mountain is, the ________ (thin) the air is.

94. To tell the ________ (true), I don’t like the drinks in that café.

95. It’s a (an) ________ (usual) experience, few people have chances to do it.