◎ 题干
—Sorry,but I have to________now.I have a train to  catch.
—Goodbye!Wish you a pleasant journey.
[     ]
A. ring out  
B. call out
C. call on  
D. ring off
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“—Sorry,but I have to________now.I have a train tocatch.—Goodbye!Wish you a pleasant journey.[ ]A. ring outB. call outC. call on D. ring off…”主要考查了你对  【动词短语】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。