Nowadays, the iron and steel industry ________ the key link in socialist production.[ ]

When shall we have a talk about the design—Any time except 8 to 9 tomorrow morning, when I_____ in my desired company.

They ________ carefully, but they didn’t ________anything.

_ difficult and challenging the task may be, wemust finish it on time, because there is a possibility _______our work will godown in history.

I’m going to Europe on vacation together with John if I ________ find the money.(2012·全国Ⅱ)