I was _____ at the stop as long as thirty minutes.

I was _____ at the stop as long as thirty minutes.
A、made waiting
B、kept waiting
C、keeping waited
D、kept waited
【正确答案】：B
【题目解析】：B 我在车站等了三十分钟。as long as 与……一样长。I was kept waiting…… 可以简单理解为：我保持等待这样的状态……（有三十分钟），Keep为保持的意思。