ery Monday morning, all the teachersand students in our school stand at ____ as our national flag is raised.

33It has escaped mewe stopped in the last classTom，would you tell me so that I can go on with my lecture?

下列各句中加点成语的使用，全都不正确的一项是①如果有一天人们司空见惯了绵延不散的雾霾，那我们还如何走出这令人窒息的污染围城②他气得脸色半青半黄，嘴唇哆嗦了半天，什么话也说不出来。③《中国诗词大会》带着深埋于中国人心中的文化基因，用国人耳熟能详的诗词，在带领观众重温中华经典的同时，完成了一次沟通古今的精神之旅。④2000多年前，我们的先辈筚路蓝缕，不仅穿越草原沙漠，开辟出联通亚欧非的路上丝绸之路；而且杨帆远航，穿越惊涛骇浪，闯荡出连接东西方的海上丝绸之路。⑤近年来，有关部门采取了一系列措施强化虚拟广告的监管，使得滥竽充数的广告得到了一定程度的遏制。

Chris is very clever and never wastes any time doinguseless things—No _______ he always comes first in the examinations

The river______ are covered with trees is polluted.