Parents ______ good conditions(条件) _______ us. We should be grateful（感激的）to them.
| A．provide, with | B．provide, for |
| C．protect, to | D．protect, for |
—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 |
—Why are you so happy today?
—Because I to London with my parents tomorrow.
| A．fly | B．am flying | C．have flown | D．flew |