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1) It was a great achievement _______________. 2) It is necessary _______________. 3) It is generous _______________. 4) The teacher decided _______________. 5) Mr. Green was wondering _______________ . 6) The gardener _______________. 7) We _______________. 8) He feels it challenging _______________. 9) We hope to have more opportunities _______________. 10) The bad weather _______________. 11) The environmentalists are against _______________. 12) Sally Ride was the first _______________. 13) They lifted a rock _______________. 14) He was surprised _______________. 15) I am sorry _______________. 16) I happened _______________. 17) She doesnt like _______________. 18) If you want to save money, youd better _______________. 19) We did nothing _______________. 20) We were made _______________. 1) to complete a 24-story building in 10 months 2) for us to have a good nights sleep before the test 3) of you to donate so much money to the people in the disaster area 4) not to punish those students who had been late for class 5) whether to visit their son in France 6) warned me just now not to water flowers at noon 7) invited him to give us a lecture on modern art 8) to be the chairman of students union in so large a university 9) to apply what we have learned in class to practice 10) ruined our plan to show the film in the open air 11) the decision to build a nuclear power station in the suburbs 12) American woman to explore the outer space 13) only to drop it on their own feet 14) to meet a high school classmate in the mountain village 15) to have taken up so much of your time 16) to be standing in the doorway when he rushed in 17) to be treated as a guest 18) go to the campus bookstore to buy used books 19) but play bridge the whole day 20) to wipe our feet on the mat before going into the room | 
