The light bulb ______ by Edison in the middle of the 1780s.
| A．is invented | B．was invented | C．invented | D．invent |
--- Listen! David is talking happily with his mother in the next room.
--- It ______ be his mother. She has gone to Yunnan to be a volunteer doctor.
| A．should | B．must | C．can’t | D．mustn’t |
--- Have you got the e-mail I sent you this morning?
--- I found an e-mail in my mailbox, but it wasn’t ______ you.
| A．from | B．for | C．about | D．with |
—Would you please help me with my drawing?
—_____. You can come to my workroom every Saturday.
| A．That’s all right | B．No problem | C．No, thanks | D．Quite well |
—Do you mind my closing the window?
.—_____. It’s much too noisy outside.
| A．Certainly I do | B．Of course not | C．All right | D．You’d better not |
—I seem to be lost. Could you tell me _____?
—Sure. You can take the No.3 bus to get there.
| A．where is the nearest hospital | B．how long it will take me to the airport |
| C．how far is my trip to the Olympic Village | D．how I can get to the National Museum |