It was Alice and her friends who helped the homeless old woman, ?
A. wasn’t it?
B. wasn’t she
C. didn’t they?
D. weren’t they?
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(答案→)A. wasn’t it?
B. wasn’t she
C. didn’t they?
D. weren’t they?
解析：考查反意疑问句。句意“是爱丽丝和她的朋友们帮助了那个无家可归的老人，不是吗？”it was... who是强调句型，强调人时，可以用who或that。反意疑问句用wasn’t it。故选A。