She ______ be ill because I saw her playing basketball just now.
A.can't
B.couldn't
C.mustn't
D.wouldn't
第2题
A、显微外科手术的费用比ICSI技术低
B、显微外科技术治疗过程简单,周期较短
C、ICSI技术需要男女双方共同治疗
D、ICSI技术可获得自然受孕
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