He didn’t listen to the teacher carefully.,he couldn’t answer those questions.

The record about the massacre is fairly clear and beyond dispute ______ those activities the Japanese soldiers were involved in.

I ______________ have passed my examination easily，but I made too many stupid mistakes．

Must I return the book today— No, you ________. You can do it tomorrow.

Our journey cost a lot of money.— Really? Well, that doesn’t matter _____ you enjoyed yourselves[ ]