高等继续教育 / 大学英语语法
正确率：100%
题型描述: 单选题
“Why couldnˊt they catch the 6:30 train ?” “Because they were delayed by ＿＿＿＿＿.”
A.a heavy traffic
B.any heavy traffic
C.heavy traffic
D.some heavy traffics
“Why couldnˊt they catch the 6:30 train ?” “Because they were delayed by ＿＿＿＿＿.”
A.a heavy traffic
B.any heavy traffic
C.heavy traffic
D.some heavy traffics
参考答案：
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