We want to know what it was____caused the accident.A.when B.how C.that D.where一定要把对错理由讲出来

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We want to know what it was____caused the accident.A.when B.how C.that D.where一定要把对错理由讲出来

We want to know what it was____caused the accident.A.when B.how C.that D.where一定要把对错理由讲出来
We want to know what it was____caused the accident.
A.when B.how C.that D.where
一定要把对错理由讲出来

We want to know what it was____caused the accident.A.when B.how C.that D.where一定要把对错理由讲出来
选C.这是it was...that的强调句型.
句子不缺少主语或者状语成分,所以不用when,how或者where.

我们想知道是什么造成了这次事故。选择:C that是一个表语从句中的连接词,

C that. What it was 既做know 的宾语又做caused the accident 的主语,需要一个先行词,只有that有这个功能