单项选择题

To succeed in a scientific research project, ______.

A. persistence is needed

B. persistence is what one needs
C. one needs to be persistent
D. one needs be a persistent person
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单项选择题
Had he worked harder, he ______ the exams.
A. must have got through

B. would get through
C. would have got through

D. could get through
单项选择题
I shall tell him the truth, ______.
A. no matter whether he likes it or notB. whether he likes it or not
C. no matter he likes it or not
D. whether he would like it or not
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