To prevent accidents, a drivers Ed car______.
A. has a sign inside it
B. has two sets of brakes
C. can’t run very fast
D. is big enough to hold five persons
正确答案：B
52．答案为B短文第二段DriversEdcarsareunlike
othercarsinwhichtheyhavetwosetsofbrakes表明训练车有两个刹车
TopreventaccidentsadriversEdcar______Ahasasigni
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