I（）in the classroom when the teacher came．

单项选择题（）such a chance，why don’t you have a try？

A.To give
B.Given
C.Having given
D.Giving

单项选择题You must do（）is best for you.

A.everything
B.all
C.whatever
D.the things

单项选择题This is the very reason（）he explained to me just now．

A.why
B.that
C.for which
D.of

单项选择题The shop stays（）all day and all night．If you need something at night，you can come here．

A.opening
B.open
C.to open
D.opened

单项选择题They tried to settle the quarrel between Mrs and Mr Henry without（）the feeling of either，but failed.

A.affecting
B.hurting
C.damaging
D.injuring

单项选择题The day before the evening party，the students were busy（）for the stage.

A.making preparations
B.on preparing
C.doing preparations
D.to be prepared

单项选择题In order to get rid of the habit of smoking，you must set a date（）you are going to stop.

A.in which
B.on which
C.from which
D.at which

单项选择题I think the idea which they have given（）pretty good in fact.

A.up is
B.in being
C.away to be
D.out are

单项选择题Although tigers are（）to people, they are（） now and we should protect them or they will die out.

A.dangerous; dangerous
B.in danger; in danger
C.dangerous; in danger
D.in danger; dangerous

单项选择题The drugaddict spent much money on his drug every day，（）he became poorer and poorer.

A.as a result
B.as the result
C.as a result of which
D.as a result of