.
About 71% of the earth’s surface ______ covered with water, but 20% of the world population ______ have access to safe drinking water.
| A．is; doesn’t | B．are; don’t | C．are; doesn’t | D．is; don’t |
— Sorry I’m late. I got stuck in traffic.
— _________. You’re here now. Come in and sit down.
| A．You are welcome | B．That’s right |
| C．I have no idea | D．Never mind |
When you are done with the book, just give it to Lucy or Helen or __________.
| A．whoever | B．wherever |
| C．whatever | D．however |
—What lesson do you draw from his failure in the job interview?
—_______. Good preparation is very important.
| A．It is good to learn from another man’s experience |
| B．One is never too old to learn |
| C．It is never too late to mend |
| D．It is no use crying over spilt milk |
Alice, bent ______ losing weight, increased the time of exercise to three hours______ a time.
| A．on; in | B．on; for | C．with; for | D．with; at |
—What time do we have to be at the gate of the museum?
—______ the visitors begin to check in.
| A．Immediately | B．Quickly | C．Hurriedly | D．Gradually |