When my mom saw the _______ gift I had prepared for her, she ________A.pleased, burst into laughterB.pleasant, burst into laughterC.pleasant, burst out laughingD.pleased, burst out laughing
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B解析pleased 高兴的，修饰人，pleasant 令人高兴的，修饰物，短语：burst into laughter 突然大笑起来，句意：当我的母亲看到我为她准备的令人高兴的礼物时，她突然大笑起来。所以选B。