题目内容：

根据句意，用括号中所给的单词的正确形式填空，并将答案用碳素笔写在答题卡相应的位置。

1.Please listen to           (I)carefully in class.

2.Wang Lihong is a famous____________(sing).

3.Dog is a___________(friend) animal.

4.My sister is very young(幼小的). She can’t brush her_______(tooth).

5.The river runs too_______, so they can’t cross the river by boat. ( quick )