The ancient Egyptians are supposed ______ rockets to the moon.

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问题 The ancient Egyptians are supposed ______ rockets to the moon.

选项 A、to send
B、to be sending
C、to have sent
D、to have been sending

答案C

解析本题考查时态。因为动词send是暂短性动词，不能用进行时，所以可以先排除选项B和选项D。根据题意，空格处不定式的动作发生在主句谓语之前，所以应选不定式的完成时， C正确。

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