Question

【题目】They looked out of the tent and saw a snake .
A.to move
B.moved
C.moving
D.moves

Answer 1

【答案】C
【解析】固定搭配 see sb do sth ，意为“看见某人做某事（指看见全过程）”；see sb doing sth，意为“看见某人正在干某事”，故选C。句意是：他们向帐篷外面看，看见了一条蛇正在移动。