【題目】We must get back to work, ____ we won't finish everything.
A.and
B.or
C.so
D.but

【答案】B
【解析】句意:我們必須回去工作,否則我們將無法完成所有的工作。and而且;or否則;so所以;but但是。結(jié)合句意,表示如果我們不回去工作,將完不成工作,故用連詞or,故答案選B。

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