“Shall Mary e and play puter games?” “No, she has finished her homework.”
A. when
B. since
C. unless
D. as soon as
网友回答
A. when
B. since
(答案→)C. unless
D. as soon as
解析：此句为省略句，答句句首的 No 表明其后省略的是一个否定句，全句补充完整为：She can’t play puter games unless she has finished her homework.