A survey of the opinions of experts that three hours of outdoor exercise a week good for one’s health.
A. show; are B. shows; is C. show; is D. shows; are
Only when you showed the pass to the guard to come out our school．
A．you allowed B．allowed you
C．you were allowed D．were you allowed
When you come into our school yard, you will notice our beautiful school _____by green trees.
A. surrounding B. surrounded
C. to surround D. being surrounded
Your article is perfect but a little long, so you’d better ______ it in order to make it fit the demand of less than 120 words.
A. cut down B. break down C. turn down D. set down
—Why do you look worried?
— Because what I am really concerned about is _____my friend can do me a favor or not..
A. although B. whether C. when D.where
