_____more countries can use natural energy in the future remains to be seen.
| A．Whether | B．This | C．who | D．If |
—Shall we make an appointment at 10:00 tomorrow morning?
— . Maybe we can make it some other time.
| A．I’d like to | B．No, I shall be busy then |
| C．Don’t mention it | D．See you then |
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 |