问题描述：
单项选择：The teacher makes_a duty for the students to clean the classroom every morning.A.which B.what C.that D.it 请说明正确答案,以及原因
I was late because my car was_by an accident.
A.held out b.held up C.held back D.held on
--I forgot to bring ma pen.May I use yours?
--It's in my drawer._.
A.Feel free B.Not to mention C.Never mind D.Good for you
I was late because my car was_by an accident.
A.held out b.held up C.held back D.held on
--I forgot to bring ma pen.May I use yours?
--It's in my drawer._.
A.Feel free B.Not to mention C.Never mind D.Good for you
问题解答：
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