真题练习

499.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

500.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

答案解析

499.答案是A;电脑死机，丢失的是尚未保存的正在处理的文件。
500.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。