25.Don＇t talk about things ofyou are not sure.

100.This species has nearlybecause its habitat is being destroyed.

99.Whether he will leavetodayor tomorrownodifference tome.

98.John has Frenchvery quickly during the last three monthsin France.

97.Do you know what the change in his attitude?

96.When Andrew was in South Africa, hego to that coffee shop at the corner every day.

95.Simon does nothis fellow workers because they often argue over trivial matters.

94.It is foolish of Nancy to Peter as her friend, because he always lies to her.

93.—Have you your friend Bill recently?一No, he doesn＇t often write to me.

92.I hadn＇t seen Mary for years, but Iher voice on the telephone right away.

91.Whether we will go on an outing this Saturdayon whether the weather is fine.