It was _____ he was so young that he couldn't do it.A.as B.since C.for D.because如果是强调句为什么不用since?
问题描述：
It was _____ he was so young that he couldn't do it.A.as B.since C.for D.because
如果是强调句为什么不用since?
答
选D，强调句，删去it was 和that句子结构仍完整
答
是___他太年轻才不会做的。
A，当
B，自从
C，为了
D，因为
很明显了，选D
答
这里不是It is .that的强调结构,因为强调句型有个特点,把it is ...that去掉后,原来的句子仍然完整和成立,我们试着把此结构去掉,原句变为===____he was so young he couldn't do it 当中缺乏必要的逗号或连接词,所以...