被动语态的选择题
---I can‘t find my key to the office.
---Perhaps it ___at your home.
A.left   B.has left    C.was left   D.had left
LADY GAGA is very popular,and she ___by many boys ands girls at school.
A.loves  B.is loving   C.is loved
--Do you often clean your classroom? 
--Yes,our classroom ____every day .
        A.clean  Bis cleaned  C.cleans