China has been successful _____ the WTO.
A. to enter B. in enter C. in entering
Did you know _____?
A. how much did the bike cost
B. where he lives
C.if he bought a camera yesterday
Look! There is a pet dog____on the ground.Let’s go and play with it.
A. lie B. lay C. lying
I don’t know _____
A. where does he come from
B. what is his name
C. how old he is
Money is important in my life. But it isn’t _____ to me.
A. everything B.nothing C.anything
---Which sign can’t be seen on the road? ---_____.
A. 
B. 
C. 
