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John thinks it won’t be long ________ he is ready for his new job.

Electronic devices such as iPods and headphones can do great harm to our hearing if _______ improperly.

_____ we gave him something to eat, he would save it up for his little sister.

--- Did Jack come back early last night?
--- Yes. It was not yet eight o’clock ______ he arrived home.

The lawyer seldom wears anything other than a suit ____ the season.

______ asked to help me with my lessons, he always refused, saying he was too busy.

----Have you finished the book ?
----No, I’ve read up to _______ the children discover the secret cave. .

He tried his best to solve the problem, ________ difficult it was.

It’s very funny that many people who lose weight gain it back after some time and end up back __________ they started.

The experiment shows that proper amounts of exercise, if _____ regularly, can improve our health.