题干
The lake near our village is _______. It's dangerous to swim in it.
A：40 metres' deep
B：40-metre deep
C：40 metres deep
D：40-metres-deep
答案(点此获取答案解析）
C
The lake near our village is _______. It's dangerous to swim in it.
A：40 metres' deep
B：40-metre deep
C：40 metres deep
D：40-metres-deep
）与x轴围成的图形的面积为