It’s important_______ the piano well.
| A．of him to play | B．for him to play |
| C．of him playing | D．for him playing |
The teachers ________________ the office for a few minutes when we arrived.
| A．had been away from | B．had left | C．have been away from | D．have left |
——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 |