英语翻译

问题描述:

英语翻译
教室里一定有很多女孩在练习跳舞
There____ ____many girls____dancing in the classroom
早晨公园里一定有不少人在锻炼
In the moring,_____ _____ _____many people_____in the park
玛丽现在可能正在家看电视
Mary_____ _____ ______TV at home now

must be practising
there must be exercising
may be watching
be 后面肯定是现在分词的~