British scientists have produced they believe is the world’s smallest Christmas cardA. w

发布时间：2020-08-16 17:49:10

British scientists have produced      they believe is the world’s smallest Christmas card．
A. which
B. who
C. that
D. what

网友回答

A. which
B. who
C. that
(答案→)D. what
解析：考查宾语从句.从句中动词believe缺少宾语,故选D.英国科学家生产出了他们认为是最小的圣诞卡片.
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