Do you have enough students to clean the laboratory? –No, I think we need____________ students.

There’s ______ ball on the ground. Would you please pass ______ ball to me?—With pleasure.

. A little learning is not dangerous so long as you know ________.

Must I finish my homework at school?— No, you_____. you can do it at home

How long have you ________ Hong Kong?— For two weeks.