May I go swimming now— No, you ______. You must finish your homework first.

下列各句中表达得体的一项是（）

It’s too late. Go to bed right away.Forget you need to get up as early as you can ______ the early train

. — Did you often e-mail your familyduring the first year at university— No. I was so busy meeting new peoplethat I didn’t write to my family as I _____.

Do you think it’s a good idea to makefriends with your students?— ______________,I do I think it’s a good idea[ ]