Every year a flood of farmers arrive in Shenzhen for the money-making jobs they _____ before leaving their

hometowns. [ ]

A. promised

B. were promised

C. have promised

D. have been promised

丘脑中发出特异性投射系统的最大核团是（）。

A.内侧膝状体

B.外侧膝状体

C.后腹核

D.外侧腹核

E.丘脑前核