Boys and girls, calm down and focus on the test paper __________ you begin to think about the answers. Be confident. You can do it!
A:as if
B:as soon as
C:Although
两千多年前,我国劳动人民就知道从矿物中冶炼____和____。
照样子写词语。
七拐八弯 七____八____ 七____八____
左转右转 左____右 ____ 左____右____
﹣2015的绝对值是____ .