Rain is pouring down from the sky without any sign of stopping．Farmers begin to worry about their crops since it _____ as long as 24 hours．

A．would rain

B．had rained

C．was raining

D．has been raining

市场经济条件下，我们对“义”与“利“的态度应该是（）

A.见利思义

B.先利后义

C.见利忘义

D.无利不干