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By the end of next year, we _____more than five thousand new words.
A. have learned
B. will learn
C. will have learned
D. have been leaming
Even if his famous father ______ in person tomorrow , it ______ too late todo anything.
A. will arrive; is
B. should arrive; were
C. arrives;will be
D. arrives ; would be
The meeting______ a full week by the time it ends.
A. will have lasted
B. would last
C. has lasted
Scientists say it may be five or ten years________ it is possible to test thismachine on human patients.
A. since
B. when
C. after
D. before