题目内容

Theaudience_____solargethatnoseatwasleftunoccupiedinthegreathall

A. is
B. are
C. was
D. has

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Thesecretaryandprincipal_____atthemeetingnow

A. arespeaking
B. isSpeaking
C. weremakingaspeech
D. haveaspeech

Threefourthsofthebread_____byBob,andtherestofthebread_____leftonthetable.

A. waseaten:were
B. wereeaten;was
C. wereeaten:were
D. waseaten:was

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再生制动系统由驱动轮、主减速器、变速器、____________、AC/DC转换器、DC/DC转换器、能量储存系统以及控制器组成。

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