— Is it helpful to study with a group?— Yes, I think so. ____________, I’ve learnt a lot.
—Would you mind my opening the window? — ________.
— What are you looking for? —I’m looking for the book _____ you lent me yesterday。
You should try to _____ the problems by yourself. You are not a child any longer.
— Do you have any difficulty _____ English? — Yes, but I try to make myself _____.
—Whose book is this? — It _______ our teacher’s. You see, his name is on it.