New ideas sometimes have to wait for years before _____.
A.being fully accepting | B.fully accepting |
C.having fully accepted | D.fully accepted |
It is well known to all that water, ______ enough, can change into ice quickly.
A.if cooling | B.though to be cooled |
C.when cooled | D.when is cooled |
I would love ______ to the party that evening, but I had an unexpected visitor.
A.to go | B.to have gone | C.going | D.having gone |
Thomas _____ in inventing many electrical machines
A.was successful | B.succeed | C.was success | D.successes |
The Changjiang River has been polluted badly and is not good _______.
A.to swim it | B.to be swum in |
C.to swim in it | D.to swim in |
I think he must have seen me at the meeting last night, ______?
A.didn’t he | B.don’t I |
C.do I | D.mustn’t he |