We will spend our summer holiday in Guilin but we haven’t decided.A. what to buyB. where

问题补充：

We will spend our summer holiday in Guilin, but we haven’t decided.

A. what to buy

B. where to go

C. how to go

D. which to choose

答案：

A. what to buy

B. where to go

(答案→)C. how to go

D. which to choose

解析：根据句意“我们将去桂林度假”，排除B项，去旅游前肯定会准备一些必备用品，排除A；D项不合句意。how to go“怎样去”符合题意，故选C。