一、 单项填空 （共20小题，每小题1分；满分20分）
( )1.This problem _________ to us many times. Why don’t you understand it yet?
A. is explaining B. has explained C. will be explained D. has been explained
( )2.The teacher found most students_______in science.
A.interesting B.interest C.are interested D.interested
( )3.Your daughter is old enough to_____herself. Don’t do everything for her.
A.wear B. put on C.dress D.have on
( )4.I think playing tennis is______more interesting than playing chess.
A.little B.much C.many D.few
( )5.Who______ my coat here ?
A.hang B.hung C.hanged D.is hanged