Could you help me put up the maps on the wall?----_______________.
| A．No problem. | B．I hope so. |
| C．That's all right. | D．That's a good idea. |
–Do you know ______?
--Yes. It’s a ball.
A. why she brought the box
B. what is in the box
C. how much the box is
It’s time ______ home now.
A. go B. goes C. to go
–I ______ know you can play the piano so well.
--Thank you.
A. didn’t B. don’t C. can’t
These are my parents. They ______ workers.
A. am B. are C. is
A ______ tree is near the river
A. big B. old C. fat