—Mum, what’s the time now?
—It’s already half past seven. Be quick,_____ you will be late.
A．ifB．orC．a(chǎn)ndD．until
B

試題分析：根據(jù)題干，本句的意思是“快點，否則你們要遲到了�！薄胺駝t”是or。所以本題選B。
點評：做本題時應熟知這四個選項的意思，特別是or，它有兩個意思：分別是“或者”和“否則；另外，本句還是一個固定句型：祈使句，or+句子（一般將來時）。
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