单选题 She ______ not have seen you yesterday, for she was not there.
A. might B. could
C. should D. must

【正确答案】 B
【答案解析】[解析] “她昨天不可能见到你，因为她根本就不在那里”。could not后面跟不定式完成式用于推断过去不可能发生某事。