What was your brother doing when you came back home from school?
難易度：高（12語）
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When the teacher is in the classroom, the students are very quiet.
My uncle studied English and German when he was young.
I was doing my homework when my mother came into(entered) the room.
Does he always use this desk when he studies?
They were not listening to the teacher then.
Were you studying English?
When did you do your homework?
There aren't any girls in this school.
How many students are there in this class?
She will be(become) a good teacher.
The examination will not(won’t) be so difficult(hard).
My brother is doing his homework in his room.