Every year a great number of foreign tourists pay a visit to _____ we Chinese call Heaven Lake.

Your Chinese is so beautiful. How long have you studied it?—I have studied it _____ 2008. [ ]

What are you doing at the moment? —I am ______ my turn to borrow books.

Please fold this piece of paper _______ a boat. [ ]

When is your father going to Hong Kong?—- He is going there the morning of November 10th.[ ]