Listen! David is talking happily with his mother in the next room.　— It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.

There is still a copy of this book in the library. Will you go and borrow _________? –No, I will buyin the bookstore.

Who are you going to havethis letter for you?—-My secretary.

Jim, get up！It’s already 9：00 in the morning．— Really? I________too much．

Next to the hotel is a small house ______ an interesting garden.[ ]