—Do you know__________going to stay in London?
—No, I don’t. Maybe a few days.
| A．when he is | B．how long he is |
| C．when is he | D．how long is he |
—What’s ______ most useful invention in the 20th century?
—______ computer, I think.
| A．the, A | B．a, A | C．the, The | D．/, The |
—The Mars-500 test will take about 520 days.
—__________ I hope it goes well.
| A．It’s a pleasure. | B．Good luck! | C．That’s OK. | D．Congratulations! |
Tom _______ the USA. He _______ back in two months.
A. has gone to; comes B. has gone to; will be
C. has been to; comes D. has been to; will be
—I don’t know _______ now.
—She is much better today.
| A．how is she | B．where is she | C．how she is | D．where she is |
_______ they are twin brothers, they don’t look like each other.
| A．Though | B．Since | C．However | D．When |