—Whose T—shirt is this? Is it John's?
—It ______ be his. It's too small for him.
| A．can't | B．may | C．must | D．needn't |
_________ the help of man-made satellites, we can know what the weather will be like
in the next few days.
| A．Under | B．With | C．Using | D．By |
---- Is the physics problem _________?
---- Yes, I can work it out _________.
| A．easy; easily | B．easy; easy | C．easily; easily | D．easily; easy |
Don’t worry, Sir. I’m sure I can run _________ to catch up with them.
| A．slowly enough | B．enough slowly |
| C．fast enough | D．enough fast |
---- I watched the TV program last night.
---- _________.
| A．So I do | B．So I did | C．So did I | D．So do I |
----_________ a year does your school have sports meetings?
---- Twice a year.
| A．How often | B．How soon | C．How long | D．How many times |