题目内容
The companies are working together to create ________ they hope will be the best means of transport in the 21st century.
A. which B. that
C. what D. who
C
【解析】C 考察名词性从句。此处缺少宾语从句的连接词,而从句________ they hope will be the best means of transport in the 21st century中they hope是插入语,因此缺少主语,所以起双重作为what。
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