we are busy with the work while they are asleep on the ground.为什么不用when呢when和while的用法有什么区别呢

there are no breaks because we're always busy with the animals.翻译 we are always busy _____ the final examinationA.withB.onC.beforeD.with doing Before the spring Festival we were busy with our housework. some of them are busy （上） lessonssome are busy 训练 with the school soccer team we are busy with the work while they are asleep on the ground.为什么不用when呢when和while的用法有什么区别呢 we are busy ____(get ) ready for the final exam 连词成句；busy/we/morning/the/in/always/are we are busy _____ for the exam in school(prepare) The students are busy with their homework 同义句转换 Some of ____(they) are busy with the orange picking. In fall,farmer are busy with the h_____ Are you still busy with the workr什么意思? 是“We are all busy with our work”还是“We all are busy with our work”?还有,be动词是不是永远紧跟在主语后面? We are busy on the weekend.（写出同义句） We _____ _____We are busy on the weekend.（写出同义句）We _____ _____ _____ _____. 选择We are _ for the test.A busy prepare B busy preparing C busy to prepare D busy to preparing we are busy today .we have to s__ for the maths test we are busy on the weekend(同义句）（we----） we are so busy at teh end of the year.There are many things___every day.