Where _____ you born? I _____ born in Wuhan. 　　

A. was, were

B. were, was

C. were, were

D. was, was

如图所示，物体A B C放在光滑水平面上用细线a b连接，力F作用在A上，使三物体在水平面上运动，若在B上放一小物体D，D随B一起运动，且原来的拉力F保持不变，那么加上物体D后两绳中拉力的变化是（　　）

A．Ta增大

B．Tb增大

C．Ta变小

D．Tb变小