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题库 / Prep2007E1-SC-133
In the past several years, astronomers have detected more than 80 massive planets, most of them as large or larger than Jupiter, which circle other stars.
most of them as large or larger than Jupiter, which circle
most of them as large or larger than Jupiter and circling
most of them at least as large as Jupiter, circling
mostly at least as large as Jupiter, which circle
mostly as large or larger than Jupiter, circling
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subgroup modifiers：当修饰被修饰名词的一部分时，用some of which/whom, some of them, some 3种形式；
（1）some of which / whom 只能引导nonessential modifier，指代的物体为人时用whom, 为物时用 which。
如：Mike’s disappointment was shared by several players who were present, some of whom were so upset that they shouted at the judge.
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