They made no effort to hide their amusement I produced a packet of sweets from my pocket.
A. however
B. whatever
C. whichever
D. whenever
网友回答
A. however
B. whatever
C. whichever
(答案→)D. whenever
解析：此题考查 whenever 引导的时间状语从句。句意为“每当我从衣袋里拿出一包糖果的时候，他们毫不掩饰他们觉得好笑”。