She may have been caught in the heavy traffic she won’t arrive here by five o’clock.A. i

问题补充：

She may have been caught in the heavy traffic, she won’t arrive here by five o’clock.

A. in case

B. in case of

C. in that case

D. in which case

答案：

A. in case

B. in case of

C. in that case

(答案→)D. in which case

解析：短语辨析。A．万一，假使； B．如果发生，假设； C．既然那样； D．在这种情况下。句意：她可能已经陷入交通堵塞，在这种情况下他无法在五点之前到达这里。故选D。