ThewholeworldisfightingagainsttheH1N1,adisease(疾病)

问题详情：

The whole world is fighting against the H1N1, a disease(疾病) ______ has caused many deaths.

A. who          B. which         C. whom          D. what

【回答】

  B

知识点：定语从句

题型：选择题