用所给动词的适当形式填空。

1. My father enjoys _____ (read) newspapers before breakfast.    

2. Listen! Can you hear someone _____ (sing) in the next room?  

3. I often help my mother _____ (clean) the house.              

4.It’s easy to stay _____ (health)                              

5.He started _____ (learn)to ride a bike 5years ago.           

贷款合同的制定原则中，( )是指贷款合同要在法律框架内充分维护银行业金融机构的合法权益。

A．适宜相容原则
B． * * 原则
C．完善性原则
D．不冲突原则