The students are kept busy reviewing their lessons

The students are kept busy reviewing their lessons The students are reviewing their lessons to ( ) ( )（做准备）the The students were reviewing their lessons when the teacher c ( )The students are busy ___over their lessons.Agoing Bwith The students in Grade 3 are busy revising __ their lessons A the students are busy （）their homework The students are busy with their homework 同义句转换 The students each _____ their lessons. the students is busy for their exams；the students are having some students are busy ( ) their homework. the students are working very hard at their lessons改为同义句什么 什 in the days the students were kept busy collecting informati