He was told that the money would have to be paid back but he refused______.
A. to do so
B. it to be done
C. doing it
D. to pay the money back
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It is time we stared to think seriously about the growing shortage of raw materials in the
A. stop
B. stopped
C. to stop
D. would stop
抗癫痫药物开始治疗时，从总量的多少开始
A. 1／3～1／2
B. 1／2～2／3
C. 2／3～3／4
D. 全量
E. 以上都不是
Galileo found it difficult to believe that the sun rotated around the earth and the earth______the center of the universe.
A. to be
B. is
C. was
D. would be
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