Scientists are______certain that there is a cancer — inhibiting agent in the blood of the shark.

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问题 Scientists are______certain that there is a cancer — inhibiting agent in the blood of the shark.

选项 A、dubiously
B、virtually
C、queerly
D、randomly

答案B

解析 B选项“virtually几乎,事实上,实际上”符合题意,如:The city was virtually paralyzed by the transit strike.(这个城市实际上已陷于交通运输罢工的瘫痪状态.)其他三项“A选项dubiously怀疑地;C选项queerly奇怪地;D选项randomly随机地,无目的地”都不正确,这三个词在语义上都无法与certain搭配。本题空格处是说几乎确信无疑。
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