There were lots of people standing watching, yet no one of them .
A. offered to help
B. offered helping
C. was offered to help
D. was offering help
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(答案→)A. offered to help
B. offered helping
C. was offered to help
D. was offering help
解析：考查词组：句意：有很多人站着看，但是没有人主动帮忙。Offer to do sth主动提出做，因为people和offer是主动关系，用主动式，选A。