灵活应用代词"it,so,that,this",使下列句子更简练
灵活应用代词"it,so,that,this",使下列句子更简练
（1）You should work harder,if you work harder ,you will make great progress.
（2）The birds sit on the backs of the elephants for food,if they don't sit on the back of the elephants ,they have to seek food in remote places.
（3）To up early in the morning and do some reading is a good habit.
（4）She was late for work because of having been caught in the traffic jam.
请认真回答,我会看情况加分的.3 Q.
注意：灵活的 “拆 分” 句子 而且只能用"it，so，that，this",
（1）You should work harder,if so,you will make great progress.
（2）The birds sit on the backs of the elephants for food,so that they don't have to seek food in remote places.
（3）It is a good habit to get up early in the morning and do some reading.
（4）It's the traffic jam that made her late for work.