Man’s understanding of nature is developing ________. It never stays at the same level.
| A．at the right time | B．for the first time |
| C．from time to time | D．all the time |
Mr. Smith with his sons ______ supper at 7o’clock yesterday evening.
| A．was eating | B．were eating |
| C．was eat | D．were eat |
We won’t start the meeting _________ our teacher arrives
| A．though | B． until |
| C． while | D． if |
I think the new comer is easy to__.
| A．get along | B．get on with |
| C．got up | D．get off |
--What do you do with your homework?
--I’m sorry, I_________ it at home.
| A．forget | B．left | C．stayed | D．Kept |
--- I don’t know how to get there.
--- I have no idea, ________.
| A．too | B．neither | C．either | D． Also |