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如: ? am beginning to know I was wrong. ? train starts to leave for Wuhan. ? began to realise that he I hurt her. 3. One learns a language by making mistakes and ______ them. A. correct B. correcting C. corrects D. to correct 4. She meant _____ but the look on your face suggested “No”. A. explaining B. to explain C. explanation D. to be explained 5. — When did you go to the States? — I remember _____ there when I was ten. A. having taken B. to be taken C. being taken D. to take 6. He is so busy that he can’t help _____ the classroom. A. cleaning B. to cleaning C. to clean D. cleaned discovery of new evidence (證據(jù) ) led to _______. A. the thief having caught B. catch the thief C. the thief being caught D. the thief to be caught 1. In some parts of London, missing a bus means________ for another hour. A. waiting B. to wait C. wait D. to be waiting Exercise 7. — I have been knocking at the door, but no one answers. — Why not ____ at the back door? A. try knocking B. try to knock C. to try knocking D. to try to knock 8. As a young man from a rich family, can you imagine ____ in such a small and dirty place? A. to work B. yourself to work C. working