题目

用所给动词的正确形式填空 80. You had better get a doctor ______________ (pull out) your bad tooth. 81. It is the first time that he ____________(meet) the singer . 82. On the wall __________(hang) two beautiful pictures . 83. The school life he was used to _________(change) a lot since ten years ago . 84. The trees were cut down and that resulted in the city ___________(bury) by sand . 85. The old man urged that all the food ___________(buy) the next day . 86. The signs ______________ (indicate) the directions have been put up. 87. The experiment is being carried out, and it remains __________ (see) whether you are right or wrong  about the results. 答案：80. to pull out   81. has met    82.hang/hung   83.has changed     84.being buried    85.(should) be bought     86. indicating  87.to be seen

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