He said that he _______ since two o’clockthatmorning.
A. waswriting
B. wrote
C. has been writing
D. had been writing
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It ____ that every student will pass the examination.
A. hoped
B. is hoped
C. hopes
D. is hoping
By the end of thiscentury, scientists ______ a cure for the common cold.
A. must discover
B. must have discovered
C. will have discovered
D. would discover
Mr. Smith _______with the government for 40 years by the time he retired.
A. would have worked
B. has worked
C. could have worked
D. had worked
He will come to see you the moment he _______ his work.
A. finishes
B. had finished
C. would finished
D. will finish