92.Linda is often seen ______(clean) the floor on Sundays.

90. My friends don't know when they will go to the farm tomorrow.

　 　My friends don't know ____ _____ go to the farm tomorrow.

89. He studies hardest in his class to keep up with the others.

　 He studies hardest in his class __ ___ he can catch up with his classmates.

88. People all over the world speak English.

　 English ____ ______ all over the world.

87. Of all the boys, Jiang Peng plays basketball best.　　　　　　

　 Of all the boys, nobody　 ____ plays basketball as ___　 as Jiang Peng.

86. I can hardly tell what caused the accident.

　 It's_____ for me to tell _____ the accident happened.

85. Most taxi drivers in Beijing are teaching _____( 自己 ) English now.

根据第一句完成第二句，是两句意思相同或相近，每个空格限填一词。

84. Your sweater is made of cotton but mine is____ (羊毛)

83. It is ____　 for children to touch the button. (危险)