The tape recoeder __out of order,the students did not know what to doA was B beingC has been D was being给原因,

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The tape recoeder __out of order,the students did not know what to doA was B beingC has been D was being给原因,
The tape recoeder __out of order,the students did not know what to do
A was
B being
C has been
D was being
给原因,

The tape recoeder __out of order,the students did not know what to doA was B beingC has been D was being给原因,
选 B.(being)
前后为因果关系,由于句首没有引导原因从句的词,不可以选A,这样,只有使用“独立主格结构”,做原因状语 =As the taperecorder was out of order,the students...
意为:
由于录音机出了毛病,学生们不知道该如何是好了.

A was

B
此处选择非谓语动词。因为句子使用逗号隔开的,证明是一个简单句,简单句只能有一个
谓语动词,句子后面已经有did not know,这个谓语了,所以前面只能选择非谓语形式。
四个选项中只有B是非谓语形式
非谓语形式包括:现在分词(ing),过去分词(ed),动词不定式(to)
翻译:录音机发生了故障,同学们都不知道该怎么办
ps recoeder-...

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B
此处选择非谓语动词。因为句子使用逗号隔开的,证明是一个简单句,简单句只能有一个
谓语动词,句子后面已经有did not know,这个谓语了,所以前面只能选择非谓语形式。
四个选项中只有B是非谓语形式
非谓语形式包括:现在分词(ing),过去分词(ed),动词不定式(to)
翻译:录音机发生了故障,同学们都不知道该怎么办
ps recoeder-recorder

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