Every year a flood of farmers arrive in Shenzhen for money-making jobs they

问题补充：

单项选择题:

Every year a flood of farmers arrive in Shenzhen for money-making jobs theybefore leaving their hometowns.

A. promised B. were promised C. have promised D. have been promised

答案：

答案：D

解析:本题考查从句的时态和语态，根据题意，句中的挣钱的工作应该是别人向农民承诺的，因此这里应该用被动语态，排除A和C。这个承诺对农民的影响一直持续到现在，因此应该用现在完成时。故选D。