国际货运中转产生的原因是()。
A.无直达航线或直挂船舶的港口
B.货物批量不支持大船停靠
C.干线与支线集疏
D.货主的特殊要求
参考答案:A, B, C, D
请分别写出法律鼓励做的、法律要求做的、法律禁止做的行为各三件。
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So far the problem we are worried about hasn’t _____ yet. [ ]
A. come down
B. come along
C. come up
D. come on