The students are busy with their homework all the time.(同义句)The students are( ) ( ) ( ) their homework.

问题描述:

The students are busy with their homework all the time.(同义句)
The students are( ) ( ) ( ) their homework.

(always) (busy) (with)
(always) (busy) (doing)

have not to(不得不)

always,busy,with

busy in doing

always busy doing