Question

Did you see them ____ basketball this morning? 

A．playing

B．were playing

C．to play

D．are playing

Answer 1

A

试题分析：句意：今天早上你看见他们打篮球了吗？see sb do sth 看见某人做过没事，see sb doing sth 看见某人正在做某事。根据句意，本句强调发生过某事，故选A。