Question

-- Lisa was seen ______ an old man go across the street this morning.
--What a kind girl she is!

A．helping

B．helped

C．to help

D．helps

Answer 1

C

试题分析：句意：---今天早上，Lisa被看到扶一个老人过街。---多么善良的女孩啊！看到某人做某事，see sb do, 改成被动语态时，应用be seen to do。故选C。