By now, more than 100 photos back to the earth by Chang’e-3.
A. had been sent
B. has been sent
C. have been sent
D. will be sent
网友回答
A. had been sent
B. has been sent
(答案→)C. have been sent
D. will be sent
解析：句意：到现在，超过 100 的照片由嫦娥 3 传回地球。 By now 到现在为止，用于现在完成时中，该句主语是动作的承受者，应用被动语态，故选C。
考点: 考查动词时态和语态的用法。