【題目】—Thank God you're safe ！

—I stepped back Just __________ to avoid the racing car.

A. in time

B. in case

C. in need

D. in vain

【答案】A

【解析】句意：——謝天謝地，你安然無恙！——我退了一步，正好及時(shí)避開了賽車。本題考查介詞短語辨析。in time及時(shí)；in case以防萬一；in need需要；in vain徒勞無益。

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