81. He didn’t finish _______(write) the book until last week.

　　82. --- How long did it take you _______(do) your homework yesterday?

　　--- About half an hour.

　　83. Let me _______(help) you _______(water) the flowers.

　　84. My watch doesn’t work. It needs _______(repair).

　　85. _______(take) good care of the vegetables, and they will grow better.

　　86. How much time did you spend _______ (watch) TV last night?

　　87. I prefer _______(read) books at home rather than _______(go) shopping on Sundays.

　　88. It’s going ______(rain); you’d better ______(take) an umbrella with you.

　　89. I often hear people _______(say) “_______(see) is _______(believe)”.

　　90. Though he often made his deskmate ______(cry), today he was made _______(cry) by his deskmate.