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1. She asked me when I would return the books to the library.
When was one-pillar pagoda built?
In spite of being ill, he decided to join the trip to the countryside.
You don't need to finish your work early.
2. If we go on throwing trash here, our neighbourhood will be polluted.
It was very kind of you to help us yesterday.
I wish I knew the answer key to this test now. She asked me how I would do the test the day after.
Why didn't you go to Lan's birthday party last night ?
Would you mind if I took seat here?