------from life pressure,many people have to go all work unt

------from life pressure,many people have to go all work until they are tired out.
A.suffering B.to suffer C.being suffered D.having suffered
为什么不选B?
Apart from caring for her children,she has to take on such heavy ------- housework as carrying water and firewood.
A.time-consumed B.timely-consumed C.time-consuming D.timely-consuming
This programme will examine the writer’s book in detail,-------an introduction to his life.
A.following B.having followed C.being followed D.to be followed
为什么不选C?