单选题
The two astronauts ______ someday hope it is to fly the craft into earth orbit were flight testing.
A. that B. whom C. whose D. who
A
B
C
D
【正确答案】
C
【答案解析】
[解析] whose在从句中作定语,相当于...it is (their hope)/the hope of the two astronauts to fly...
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