83. A: Why was he so angry just now?　　

B: ______ ______ him so angry just now?

82. A: He has been away from here for several years.　

B: It is several years ______ he _____ here.

81. A: Tom knows much more about computer than any other student in his class .

　　 B: _______ _______ in our class knows so much about computer as Tom .

80. A: He felt very surprised that there were so many strange people in the room.

B: He was very surprised _______　 _______ so many strange people in the room.

79. A: It took her a week to learn to ride a bike.　 　　　　　　　　　　

B: She ______ a week _____to ride a bike.

78. A: I gave her some advice. The advice was about English study.

B: I gave her some advice _______　 ________ to study English.

77. A: A lot of men have stopped smoking.　

B: A lot of men have ______　 _______ smoking.

76. A: What is he going to be when he grows up?

　 B: What is he going to be when he is _______　 ________ a child?

75. A: It rained heavily, so he didn’t go to work yesterday.

　 B: The ______　 rain _______ him going to work yesterday.

在下列每组B句的空白处填上适当的单词，使B句和A句意思相同。

74. A: I saw Tom on the playground yesterday. At that time he was playing football.

　 B: I saw ______　 _______ football on the playground yesterday.