Do you know ?
Perhaps tomorrow,But I'm not sure.( )
A.how well go to the museum
B.which place well visit next Sunday
C.when we'll travel to Disney Land
D.why he won't come here
I think it's impolite _______ others waiting.( )
A.to keepB.keepingC.keep
I cleaned my room yesterday. It _______ a little difficult.( )
A.isB.wasC.will be
Mountain climbing is one of _______ sports in the world.( )
A.dangerousB.more dangerous
C.the most dangerous
Are these your books?
No, they aren't. They are _______.( )
A.sheB.hersC.her
What's this?
It's _______ watch.( )
A.aB.anC.the