单选题I often mistake him 

问题补充：

单选题Ioftenmistakehimforhisbrother,becausehe_____hisbrothersomuch.A.is similarB.resemblesC.looks asD.is alike

答案：

B解析考查固定用法。be similar to与…类似；resemble sb in…在…方面与sb类似；looklike…看起来像….; be like…像….;A项少了to; C应该改为look like; D应该改为is like.