题干
— Where _______ you put my dictionary?
— I left it on your desk when you _______ to Tom.
— I left it on your desk when you _______ to Tom.
A：did; spoke
B：have; were speaking
C：had; were speaking
D：had; spoke
答案(点此获取答案解析）
B
在区间［3,7］上是增函数，且最小值为-5，那么
在区间［-7，-3］