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(C) the tomato was viewed with suspicion by northern Europeans, who

(D) the tomato was suspicious to northern Europeans, and it was

                 答案是C，没问题

                     想请问：D选项中and it was assumed后面加上that，是否正确？？（肯定没C好，但是否正确呢？）

                         即这个句子：and it was assumed that it had poisonous properties because of its relationship to deadly nightshade.

                            此处第一个it是形式主语，第二个指的是tomato，可以这样用吗？？？

                         另外，可以参见这个例子：大全261

261.                             During the 1980s it became clear that soliciting private funds was far more efficient for environmentalists who sought financial aid than to go to state or federal agencies.

(B) that for environmentalists who sought financial aid, it was far more efficient to solicit private funds

                     答案是B，此处第一个it是形式主语，第二个it也是形式主语，但是指代不同，按照答案，是可以这样用的。