问题补充:
31. —How longeach other before theymarried?
—For about a year.
A. have they known, get
B. did they know, were going to get
C. do they know, are going to get
D. had they known, got
答案:
A. have they known, get
B. did they know, were going to get
C. do they know, are going to get
(答案→)D. had they known, got
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