Please lend English book to .( )
A.your,meB.you,meC.you,I
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