题目内容：
The experiment ______ the discovery of a cure for cancer.A. happened to
B. led up
C. resulted in
D. set up
参考答案：
选择题：The experiment ______ the discovery of a cure for cancer. A. happened to B. led
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请在第33处填上正确答案。A.spirit B.result C.strength D.courage
请在第33处填上正确答案。A.spirit B.result C.strength D.courage
Many things __________impossible in the past are common today.A.to considerB.bein
Many things __________impossible in the past are common today.A.to considerB.bein
请在第34处填上正确答案。A.patient B.terrified C.pleased D.e nioyable
请在第34处填上正确答案。A.patient B.terrified C.pleased D.e nioyable
Not until all the fish died in the river__________ how serious the pollution was.
Not until all the fish died in the river__________ how serious the pollution was.
1953年至1956年国内的主要矛盾是( )A.中国人民同国民党残余势力、地主阶级和帝国主义的矛盾B.工人
1953年至1956年国内的主要矛盾是( )A.中国人民同国民党残余势力、地主阶级和帝国主义的矛盾B.工人