Many farmers arrive in Shengzhen for money-making jobs which ____before leaving their hometown.
问题描述:
Many farmers arrive in Shengzhen for money-making jobs which ____before leaving their hometown.
空格部分是they have promised还是they have been promised
答
选择:they have promised.
而they have been promised 若看做被动语态,没有这种用法;若将其看成是be+表语,promise也没有此种用法.