—Thank God you’re safe!
—I stepped back，just to avoid the racing car. (2012·江苏，29)
A. in time
B. in case
C. in need
D. in vain
网友回答
(答案→)A. in time
B. in case
C. in need
D. in vain
解析：
in time及时；in case万一，以防；in need需要；in vain徒劳，无济于事。句意为：——谢天谢地，你是安全的！——我后退了一步，及时躲过了那辆赛车。由句意知选A项。