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 dubiously怀疑地;queerly奇怪地;randomly随机地,无目的地;这三个词在语义上都无法与certain搭配。virtually几乎,事实上,实际上,在此修饰certain,意思是“几乎确信无疑”。
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