_____ many times, he finally understood it.
A.Told B.Telling C.Having told D.Having been told
At one point I made up my mind to talk to Uncle Sam. Then I changed my mind, ______ that he could do nothing to help.
A.to realize B.realized C.realizing D.being realized
--- Why don't we choose that road to save time?
--- The bridge to it .
A.has repaired B.is repaired
C.is being repaired D.will be repaired
At the awarding ceremony held in Tokyo, the scientists were surprised by what ______ in science and technology.
A.has discovered B.has been discovered
C.had discovered D.had been discovered
—The manager has come back from his business trip. He is asking you for the report.
— Oh，my god ! I haven’t finished it yet. But he ________ back at the company tomorrow.
A.was expected B.will expect
C.expected D.will be expected
The officer commanded that everyone passing by ______ that day.
A. search B. would be searched
C. be searched D. must be searched
