John may phone tonight. I don't want to go out ______ he phones.

A.as long as

B.in order that

C.in case

D.so that

答案及解析： C

解析：

四个连词均可引起状语从句。as long as: “只要；

in order that/so that:”“以便、为了”；

in case:“以防、万一。”C项切题。