我儿子的老师说他作业经常粗心马虎。

My son's teacher says that his work is often ___careless and sloppy.

他对她的外表发表了粗心的评论，这让她很不安。

He made a ___careless remark about her appearance that really upset her.

每天都有车祸发生，因为很多司机粗心大意。

Car accidents happen every day, because many drivers are ___careless.