题目内容
句型转换
I don't often get flu because I keep on exercising every day.
I ________ get flu because I keep on exercising every day.
I don’t often get flu because I keep on exercising every day.
I ________ get flu because I keep on exercising every day.
用动词的适当形式填空
I am quite healthy because I keep on ________(take)exercise every day.
I keep on walking after supper because I can't think of a _________ way to keep fit.
A.better
B.best
C.worse
D.worst