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Personally I prefer to stay up ______at night, but not ______I’ll have to drive to work the next day.

This is the concert hall ________ he has given very successful performances.

--It was 3 o’clock_______we arrived at the village.
--Oh，it was also at 3 o’clock______we arrived at the village.

We should consider the professor’s advice _______ our school library provide more books on popular science.

Nowadays we students are so busy that we don’t have much time for outdoor sports activities, _______we have the interest.

—I was on the point of crossing the road _______ the car accident happened.
—So you are a witness.

       I paid a visit to the small town last week where I was born, which I hadn’t
visited for years.

Our school basketball team won the championship (冠軍), ______ cheered all of us up.

Mary is an honest girl; I say it, ________I don't like her.

Whether life will continue on the earth for millions of years ______will depend on ____this problem can be solved.