Hard as he worked,_____he coludn't make enough money to support his family. Aand Bbut Ctherefore D/
问题描述：
Hard as he worked,_____he coludn't make enough money to support his family. Aand Bbut Ctherefore D/
答
B.
虽然他努力工作, 但是还不能赚足够的钱去支持家庭
答
D 这里句意是转折的,但是因为从句倒装,所以不需要连词.