I can think of many cases _______ students obviously knew a lot of English words and expressions but couldn’t write a good essay.
| A．why | B．which |
| C．as | D．where |
. How can you possibly miss the news？ It _______ on TV all day long.
| A．has been | B．had been |
| C．was | D．will be |
She raised her finger to her lips as _____ for silence.
| A．an idea | B．a mark |
| C．a sign | D．a word |
—Didn’t the guard see him breaking into the bank？
—No, he _______ in the other direction.
| A．was looking | B．had looked |
| C．looked | D．is looking |
We already have ______ pencils, but we need two ______ pens.
| A．dozen of, dozen | B．dozens of, dozens |
| C．dozens of, dozen | D．dozens of, dozen of |
“I suppose you _____ that report yet？” “I finished it yesterday, as a matter of fact.”
| A．didn’t finish | B．haven’t finished |
| C．hadn’t finished | D．wasn’t finishing |