Where did Vera go vacation?A. inB. onC. atD. of

问题补充：

Where did Vera go vacation?

A. in

B. on

C. at

D. of

答案：

A. in

(答案→)B. on

C. at

D. of

解析：句意：Vera去哪里度假了？go on vacation意为“去度假”，为一固定短语；故选B。