这个要填哪个状语从句?

请问用哪个词要使得两个句子的意思相同.

1.A:Weshouldlearnfrombooksandweshouldlearnfromteachers.

B:Weshouldlearn______frombooks______fromteachers.

2.A:Hismothercan’thelphimwithhislessons,andhisfathercan’t,either.

B:______hismother______hisfathercanhelphimwithhislessons.

3.A:It’shardwork,butIenjoyit.

B:______it’shardwork,Ienjoyit.

4.A:Mencan’tlivewithoutairandwater.

B:Menwilldiewithoutair______water.

5.A:Ifyoustandhigher,youwillseefarther.

B:Standhigher,______youwillseefarther.

6.A:Ifyoudon’tworkharder,youwillfailintheexam.

B:Workharder,______youwon’tpasstheexam.