—______ two little boys behind the trees?

—No, ______. [ ]

A. Is there; there is

B. There isn't; there are

C. Are there; there aren't

D. There aren't; there aren't

关于我国农业的叙述不正确的是（　　）

A．总体上说，我国农业还比较薄弱

B．我国粮食单位面积产量居世界先进水平

C．我国正在走科技强农之路

D．我国粮食总产量和耕地均居世界前列