We now know that about______all the kinds of seaweed are animals.

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问题 We now know that about______all the kinds of seaweed are animals.

选项 A、one fourth
B、one fourth of
C、one four of
D、the one fourth

答案B

解析 该句大意是“我们现在知道大约1/4的海草种类属于动物。”“1/4”的表达法是onefourth,介词of表示“(其中)……的。”
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