expenses 做主语,谓语是单数还是复数?

expenses 做主语,谓语是单数还是复数?
湖南高考试题:33. The university estimates that living expenses for international students ________ around $8,450 ayear,
which ________ a burden for some of them.
A. are;is B. are;are C. is;are D. is;is
jackguojun 1年前 已收到1个回答 举报

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先看个例句:
Our living expenses have enhanced.
我们的生活费用已上涨.
所以用are
第二个空是主语是:a burden,所以谓语用单数的.
答案是
A

1年前

3
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