下列各句中，括号中的成语使用不恰当的一项是()

与大气逆辐射有关的现象是：（）

— The manager of the factory wants to improve production a great deal, but he doesn’t spend much on technology.

— I am afraid he won ’t realize his dream. You know ________.

在温带森林食物网中，有“果实→鼠→鼬→狼”食物链，为避免鼠灾，应采取的最好措施是：()

——Who knocked at the door?

——I’ve no idea. I just pretended nobody was at home, so I didn't ask who _____ was.