It was in 1949 ___new china was founded.为什么要填when,怎么样才能填that
问题描述：
It was in 1949 ___new china was founded.为什么要填when,怎么样才能填that
难道这句不是强调句吗
答
这里的in是介词,在介词出现的情况下不能用that,when在这里替代的是in1949,所以不能被that代替.如果意思不变换成that可以把这个句子变成同位语从句：the time that new china was founded is 1949.