__________ I have a look at your new e-book–I am sorry. I can’t find it. My mother ______ have taken it. But I am not sure.

____the old couple as his own parents , the young man did all he could to make sure they lived a happy life .[ ]

The whole book he wrote_____ three parts, it’s mainly about Ming Dynasty.

There will be less pollution _____ more people use public transportation.

must have been a long trip — Yeah, it _____ us a whole week to get there