问题
选择题
-----The classroom is _________ clean _______ it was yesterday.
------Sorry, I forgot to clean it.
A．as, as
B．so, as
C．not as, as
D．more, than
答案
答案：C
题目分析：句意：----教室没有和昨天一样干净。----对不起，我忘记打扫了。not so/as…as…和……不一样……clean的比较级是cleaner,根据题意，故选C