62. Your advice that______ till next week is reasonable.
　　A. she waits B. she wait C. wait she D. she waited

　　63. The board deemed it urgent that these files right away.
　　A. had to be printed B. should have been printed
　　C. must be printed D. should be printed

　　64. It was essential that we lease before the end of the month.
　　A. sing B. singed C. had signed D. were signing

　　65. It is appropriate that some time ______thorough study of the results of the Apollo mission.
　　A. devotes to B. devoted to C. is devoted to D. be devoted to

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