— Mary, let’s go to the lecture by Hawking, which is said to be very interesting.
— I’d like to, but I ________ finish the report first.
A. can B. may 
must D. shall
Only after Mary read her composition the second time the spelling mistake.
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
--Would you like to play basketball with me?
--________, but I have too much homework to do.
| A．I’d love to | B．That’s all right |
| C．It doesn’t matter | D．Not at all |
--Li Mei usually helps others, ________?
--Yes, she is kind-hearted.
| A．does she | B．is she |
| C．doesn’t she | D．isn’t she |
He devotes ________to ________.
| A．himself; teaching | B．himself; teach |
| C．him; teaching | D．him; teach |
Don’t turn on the radio __________ your mother allows you.
| A．unless | B．because |
| C．if | D．and |