84. Don’t disturb me. I _____________ a letter.

83. Nick is imaginative and always ____________ up with new ideas.

82. __________ she _____________ an operation when I telephoned her last night?

81. Mr White _____________ to tell me the truth and so he did.

80. There ____________much rain in my hometown since the beginning of this month.

79. My father prefers walking to _____________ because he is a bit older.

C．用所给动词适当时态填空。

78. This hall is __________ bigger than that in our school.

77. You seems __________. Why not go to bed ?

76. They are happy that they have completed the task ______________.

75. He is feeling blue now, but no one pays attention to his _______________.