问题补充:
--- It’s already 9:00 o’clock, but he hasn’t turned up yet.
--- He in the traffic jam.
A. could have caught
B. should have caught
C. must catch
D. would have caught
答案:
(答案→)A. could have caught
B. should have caught
C. must catch
D. would have caught
解析:可联系答.案.网客服索取。