It takes the spaceship more than three days to ______ the moon.
A. to send B. being sent
C. to be sent D. sending
It takes the spaceship more than three days to ______ the moon.
A. to send B. being sent
C. to be sent D. sending
C
it是形式主语,真正主语是不定式,此处应用不定式的被动式。