Tom is studying math.The twins are also studying math.(合并为一句)
问题描述：
Tom is studying math.The twins are also studying math.(合并为一句)
______ ______ the twins ____ ____Tom _____studying math.
答
Not only but also is
两个主语被Not only...but also...(不仅.而且.）连接时,谓语在数上要和最靠近的主语（此句是Tom)保持一致,所以后面动词用is
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