问题
选择题
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
答案
答案：C
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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
答案：C