The wallet must LiLei’s. Look! It has his ID card in it.A. beB. belongC. isD. belong to

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(答案→)A. be
B. belong
C. is
D. belong to
解析：be 系动词，是；belong属于；is第三人称单数系动词；belong to属于。句意：这个钱包一定是李磊的。看，里面有他的身份证。Belong表示属于时，后面接名词作宾语，根据前文情态动词must可知后面动词用原形，选A。