Who has eaten all the cake Jim? - Oh must be your two pet dogs.A. itB. theyC. tha

问题补充：

--- Who has eaten all the cake, Jim?

--- Oh, must be your two pet dogs.

A. it

B. they

C. that

D. which

答案：

(答案→)A. it

B. they

C. that

D. which

解析：考查代词。根据句意并不知道是谁，不知道性别，故用it作代词。句意：——吉姆，谁吃了所有的蛋糕？——哦，一定是你的宠物狗。