单选题 Travelling like this is really an adventure. Very often, you're doing something strange where you don't know what's going to ______ around the next bend.
A. turn off B. turn on C. turn away D. turn up

【正确答案】 D

【答案解析】[解析] D选项：turn up的意思为“出现”，如：He didn't turn up until half an hour later．(半小时后他才出现。)句意：像这样的旅行真是一种冒险。你常会去做些陌生的事，不知道在下一个拐弯处将看到什么。故选D。
其他三项意思分别是：turn off关掉，断开，拐弯；turn on打开；turn away转变方向，拒绝。