用所给单词的适当形式填空。

1.The ________(child) are young. You must look after them.

2. Who __________(wash) the dishes after dinner in your family?

3.Would you like ______(drink) a cup of tea?

4. It's Sunday today. What about _____(listen) to music?

下列情形中，属于可变更或可撤销合同的是（）。

A．因重大误解订立的合同

B．因一方胁迫或乘人之危而订立的合同

C．恶意串通，损害国家集体或第三人利益的合同

D．在订立合同时显失公平的合同

E．在没有经过双方当事人同意而擅做主张订立的合同