I thought _____good.to teach children to read and write as early as possible, but in fact____not the case.
选项C. it was, it was D. is, it's
第一空it was 和it都可以解释的通,那么第二空到底是现在时更好呢还是过去时呢?
thought 后面接宾语从句,所以 D. is, it's 是错误的(从句缺主语)。第二空不能用现在时,应该用过去时。