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- 单项选择题Cars will ( ) groups of ten to twelve vehicles, only six feet apart, traveling in unison, and controlled by computer. ( 章节：2 难度：2)
A、bunched into
B、be bunched into
C、bunched on
D、be bunched on
- A
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A、bunched into
B、be bunched into
C、bunched on
D、be bunched on
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