We all feel it is Jack as well as his wife that for their son's bad performance at schoolA.are to blame B.is to the blamedC.are to be blamedD.is to blame
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D解析试题分析：考查blame用法和主谓一致。固定词组be to blame应受责备。该词组用主动语态表示被动含义。本题的主语是Jack，故使用单数形式。故D正确。句意：我们感觉Jack和他的妻子应该为他们的儿子在学校的糟糕表现负责。考点：考查blame的用法点评：blame的用法主要为：blame sb for sth因为某事责备某人；be to blame应受责备（要主动形式表示被动含义）。