用方框中所给单词的适当形式填空。

1. Mom, help _____ (find) my friend Jim, please.

2. This bike isn't mine. It's ______(she).

3. Mike and I are in the same grade, but we are in different ______(class).

4. He ______(have) a round face and short hair.

5. What color _____(be) those pants?

证券交易风险的制度防范包括事先预警、实时监控和事后监察等几个方面．