用所给词的正确形式填空。

1. "Do you like noodles?" "No, I don’t like _____ at all."( they )

2. He often _____ letters to his mother. ( write )

3. Our _____ begin at 7:30 every morning. ( class )

4. We are twins. I have long hair, and she _____ long hair, too. ( have )

5. The _____ like milk and cakes. (baby)

动态资产配置的目标在于，在不提高系统性风险或投资组合波动性的前提下提高长期报酬，这与风险与收益匹配的原则互相矛盾。( )