Youshouldtrytowrite__________evenwhenyou’rebusy.Asyouknow,practicemakesperfect.

我国积极争取借用的国外资金是()。

设3元非齐次线性方程组Ax=b有解α1，且r(A)=2，则Ax=b的通解是

Thereareoversix________students_____partintheentranceexaminDongchengonMaythesecond.

—Whyhaveyouchangedsomuch?

—Youdon'tknowI______ahardlifeinthelasttenyears.