问题

Don’t be so disappointed.I’m sure that you can do better in the next exam. –Yes, but I ____ this time.

A:should be more careful
B:could be more careful
C:should have been more careful
D:must have been more carefully

正确答案是：

同类题型

The party ____since the new year .[ ]

aged by my science teacher, I set about mystudies on developing my product, _____I hope I will succeed in applying for apatent.

Researches are convinced ______ the positive effect of laughter ______ physical and mental health

I’m sorry, I can’t go shopping with you. – Never mind. Lily will go with me.

Could you ___________ the computer for me, dear I want to check my e-mails.—Certainly, I’ll do it right away.