His speech was extremely boring that it was ______interrupted by applause and cheers

gh the causes of cancer ____, we do not yet have any practicalway to prevent it.

The thief was noticed _____theoffice building by the back door on the screen.

下列各句的文言句式与例句相同的一项是（　　）例句：回也非助我者也

填入下面文段空白处的词语，最恰当的一组是注重学英语是好事，同时也要十分重视母语的学习。汉语是世界上最优美、最富表现力、最有魅力的语言之一。 ① 中国改革开放进一步发展，学习汉语的名国人越来越多，我们自己 ② 应该学好汉语，用好汉语。 ③ 某些人以能讲英语为荣，说话时 ④ 夹上许多“洋文”，而母语的使用 ⑤ 白字连篇，出尽“洋相”。