983.If a computer crashes,you will lose the file you ______ on if you don't save it early enough.

A.are working

B.work

C.will work

D.worked

984.Stella,you _______ things about.Look,what a mess in your room!

A.always throw

B.have always thrown

C.are always throwing

D.have always been throwing

983.答案是A;

电脑死机，丢失的是尚未保存的正在处理的文件。

984.答案是C;

be always doing sth.意为:总是干某事，老是干某事。此结构常用来表示欣赏，赞扬，厌恶，埋怨等感情色彩。