__Mary happy today?I don't think so.She __ look happy this morning.A.Is isn't B.does ,doesn't C.is ,doesn't
问题描述：
__Mary happy today?I don't think so.She __ look happy this morning.
A.Is isn't B.does ,doesn't C.is ,doesn't
答
选C be happy 开心 玛丽今天开心么？ 我不这么认为，她今天早晨看起来不怎么开心。
答
选C be happy 因为happy 是形容词，之前用be动词提问；look则用do提问，而she是第三人称单数，所以用does
答
C
happy是形容词 要与系动词连用 is
look是动词 否定式 要用到do 叫上not 表否定