还原句子it. was how that they found..........然后去掉it was that就变成how they found.........去掉的部分,剩下的句子不缺成分就行了,
还原一下语序就是
it was how that……
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判断强调句的方法:去掉That句子仍然成立他就是强调句。
这道题你用陈述句语序变为It is the entrance…that they found yesterday,就可以很明显地看出所要强调的部分。