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31. (A, the, -) North Pole (conquer) in 1909 by (a, the, -) American engineer named Robert Peary, who had given twenty-three years of his life to Arctic exploration. 32. (There, it) must be (a, the, -) solution of the problem. 33. Helen said that if the fog (get) any (thick), the plane might make an emergency landing at London airport. 34. We (must, can, may) send a telegram to congratulate them (for, with, on) their silver wedding which (take place) (during, through, in) a week. 35. The plane which originally headed (in, on, for) Birmingham (must, could, have to) make an emergency landing at Luton airport. 36. The advantage (of, in, over) computers (be) that they (can, must, may) process information (quick, quickly). 37. He's got (a, the, -) headache. He (work) (on, at, with) the computer all morning. 38. My friend is looking forward to (visit) a lot of (exciting, excited) places. 39. It (take) Christopher Wren thirty-five years to build St. Paul's Cathedral. 40. Everyone knows what they have to do, ... ? 41. Where your sisters-in-law (work) ? 42. How many (time, times) did Rick phone? - Sorry, but I haven't got (time, times) to listen to his calls. 43. You (shouldn't, mustn't, can't) eat too much (chocolate, chocolates). 44. He never works overtime. If he (work) overtime, he (earn) as much as I do. 45. Bill was upset. If he (not, spend) so much time on the first question, he (have) enough time to do the others properly. Add the correct prefixes or suffixes to the words given at the end of each sentence and fill in the blanks. 212
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