His school work is suffering because of family problems.
由于家庭问题，他的学业日渐退步。
Two players are out of the team because of injury.
两名队员因伤退出了比赛。
Why get upset just because you got one bad grade?
何必因为一次成绩不好就想不开呢？
No payments were made last week because of a computer error.
由于计算机出错，上周未付任何款项。
She found it difficult to make friends because of her natural reserve.
她因天性矜持很难交到朋友。