问题
选择题
23. Every Monday morning, all the teachers and students in our school stand at ____ as our national flag is raised.
A．attention
B．attentions
C．at ease
D．Attentively
答案
A
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23. Every Monday morning, all the teachers and students in our school stand at ____ as our national flag is raised.
A．attention
B．attentions
C．at ease
D．Attentively
A