As it turned out to be a small house party, we __________ so formally.
| A．needn’t dress up | B．shouldn’t dress up |
| C．were not necessary to dress up | D．needn’t have dressed up |
You should have put the milk in the ice box. I expect it ___undrinkable by now.
| A．became | B．had become | C．has become | D．becomes |
Great as Newton was, many of his ideas_____today and are being modified by the work of scientists of our time.
| A．are to challenge | B．have challenged |
| C．are challenging | D．have been challenged |
— Can you give me the right answer?
—Sorry, I ______ . Would you repeat that question?
| A．hadn't listened | B．haven't listened | C．don't listen | D．wasn't listening |
It’s politely requested by the hotel management that radios _____after 10 o’clock at night.
| A．were not played | B．not to play | C．not be played | D．did not play |
In the_____of proof , the police could not take action against the man .
| A．lack | B．shortage | C．absence | D．failure http:/ |