We went to the beach last Sunday, and we had great fun _____ volleyball.

In the bookshop, a reader asked the shopkeeper _______ A Brief History of Time (时间简史)was an interesting book.

I’m afraid you have to get ______ X-ray, young man.

Mr. Li, with his wife and son, often ________ to Ganshan for skiing in winter.

68 It was at four o’clock in the afternoon____ he and his grandpa reached the museum in Guanghan.