55、Hurry up or we 　　　　 　(be) late for class.

54、It takes him half an hour 　　　　　　　 (go) to work by bus.

53、It 　　　　 　　(snow) hard now. You’d better 　　　　 　(stay) at home.

52、Have you finished 　　　　　 　　(read) this book?

51、It’s not easy 　　　　　　 (catch) fish with your hands only.

50.“What makes you 　　　　　　　 　　(think) I’m a farmer?” the Frenchman asked.

49、She 　　　　　　 (work) in this factory for ten years.

48、The boys 　　　　　 (have) a basketball match now. Let’s 　　　　　 　(go).

47、Our teacher 　　　　　　 (join) the party twenty years ago.

46、My father is very busy. He often 　　　　 　(come) home late.