( A ) 12.It took many years for the story ____by most people.
A.to be accepted B.being accepted C.to accept D.accepted
for the story to be accepted by most people（不定式的复合结构充当主语）
( B ) 13.Why don’t you have your sister ____ it for you?
A.done B.do C.to do D.doing
have sb do sth让某人做某事
( D ) 14.When you have to interrupt somebody,don’t forget____ “Excuse me”.
A.say B.said C.saying D.to say
forget to do（忘记做……）
( D ) 15.What about leaving it here and _____ it on the way back?
A.collect B.to collect C.collected D.collecting
collecting和leaving并列,充当about的宾语