问题

Sodifficult itto work out the problem that I decided to ask Tom for advice

A:must
B:mustn't
C:should
D:shouldn't

正确答案是：

同类题型

The new dictionaries are very usefulThey _______ well and _______ already

30. Even if you are an experienced teacher, you sometimes ____ make some mistakes.

Mom, I am not a child .I can look after .

My aunt is a writer. She ______more than ten books for 30 years.

Please tell me___________.— Next Saturday.