It is very important for us to _______and work hard.
| A．keep fit | B．keep fat |
| C．keeping fit | D．keeps fat |
——Would you mind my opening the window?
——__________.
| A．Of course, open it | B．Certainly not, do please |
| C．No, don’t do it | D．No, I would not |
—— He didn’t catch the train, did he?
——__________, though he was caught in the rain.
| A．No, he didn’t | B．Yes, he did | C．No, he did | D．Yes, he didn’t |
—— Is Jim at home by himself?
—— No, there is another boy __________ with him.
| A．playing | B．play | C．plays | D．to play |
—— Where is your father?
—— He has gone to the supermarket. He __________ at home.
| A．must be | B．mustn’t be | C．can be | D．can’t be |
—— What about having a rest? We have worked so long.
—— OK. Stop__________，please. Let’s stop__________ some water．
| A．working；having | B．working；to have |
| C．to work；to have | D．to work；having |