题目内容
【题目】医生必须提防把疾病传染给家人。
A doctor must always_________________________ passing on disease to his family.
【答案】guard against
【解析】
考查提防这个词组，guard against，must后面加动词原形，故答案为guard against。
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题目内容
【题目】医生必须提防把疾病传染给家人。
A doctor must always_________________________ passing on disease to his family.
【答案】guard against
【解析】
考查提防这个词组，guard against，must后面加动词原形，故答案为guard against。