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    【题目】The number of children losing both parents to Aids ______ also expected to rise.

    A. was B. is C. are D. were

    【答案】B

    【解析】

    试题分析：考查时态和谓语动词的单复数形式。该句中主语：The number of children losing both parents to Aids宾语：expected to rise.主语是一个事物——即“因艾滋失去双亲的孩子的数量。”这里的数量是看做一个整体，所以用单数的谓语动词。根据语境来看，该句是陈述句语气，描述客观事实，所以用一般现在时。句意：因为艾滋病失去双亲的儿童数目有望上升。故选B。

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