Both his parents look sad. Maybe they ______ what has happened to him. [

题型：河北省模拟题难度：来源：

Both his parents look sad. Maybe they ______ what has happened to him. [ ]
A. knew
B. have known
C. must know
D. will know

答案

举一反三

He ________ his bike so he has to walk there.[ ]
A.lost
B.has lost
C.had lost
D.loses

题型：同步题难度：| 查看答案

—Where is John?
—He has gone to the library. He _______ there for an hour.     [     ]
A. has gone
B. has been
C. has been in
D. goes

题型：河北省模拟题难度：| 查看答案

Sally loves to talk about travel. She ______ many places. [     ]
A. has gone to
B. has been to
C. has gone for
D. has been from

题型：河北省模拟题难度：| 查看答案

You don’t need to describe her. I ______ her several times.[ ]
A. meet
B. will meet
C. have met

题型：同步题难度：| 查看答案

He ______ this dictionary for 5 years. He ______ it in 2004.     [     ]
A. has bought; bought
B. bought; bought
C. has kept; has bought
D. has had; bought

题型：同步题难度：| 查看答案