_______ he did well, he was never top of his class.
| A．Although | B．But |
| C．Because | D．Since |
—I’m afraid I can’t ________ you, sir. Can you speak more slowly?
—Of course.
| A．find | B．hear | C．see | D．follow |
—Hey, Jack. Waste paper ________ here.
—Sorry, I won’t do that again.
| A．cannot throw | B．cannot be thrown | C．will not throw | D．will not be thrown |
Our team tried our best, ________ we failed the match at last.
| A．but | B．and | C．or | D．while |
Mr. Li will go to Guangzhou by air. His workmates are ______ at the airport.
| A．turning him off | B．seeing him off | C．taking him off | D．putting him off |
The computerin 1946 in America.
| A．is invented | B．was invented | C．invents | D．invented |