You should understand the traffic rule by now.You’ve had it often enough. [ ] A.
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![You should understand the traffic rule by now.You’ve had it often enough. [ ] A.](/pic/43_927436.jpg)
You should understand the traffic rule by now.You’ve had it ________ often enough.
[]A.explaining
B.to explain
C.explain
D.explained
试题答案
答案:D