If chronic hepatitis______can cause cirrhosis or liver failure.

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问题 If chronic hepatitis______can cause cirrhosis or liver failure.

选项 A、progresses. It
B、progresses, it
C、progresses; it
D、progresses it

答案B

解析 The sentence has two clauses. The first clause is an adverb clause. A comma separates the adverb clause from the main clause.

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托福（TOEFL）

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