At the computer operation test, one is supposed to stay at his own machine, keep his eyes on his screen, ______ to anyone.
| A．and not to speak | B．but could not speak |
| C．instead of speaking | D．or rather speak |
. -- Jack _______ for work in the downtown. What was the matter?
-- _______, but he had no luck.
| A．ought to have hunted; So he was | B．ought to have hunted; So he did |
| C．ought to hunt; So he has | D．ought to hunt; So he did |
What __ public is concerned about is whether the scientists win be able to find _______ cram for the disease.
| A．the; a | B．the; / | C．/; a | D．/; the |
Alice was_________the letter from Tom, but it didn't reach her for some reason.
| A．expecting | B．waiting | C．waiting for | D．expected |
It ______ last night ______ Tom saw an interesting film in Dongfeng Cinema.
| A．is; that | B．was; that | C．was; which | D．was; who |
Only when class began ______that he had left his book at home．
| A．will he realize | B．he did realize | C．did he realize | D．had he realized |