Many animals are ______ risk because of climate change.
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The security guard is _______ duty all night.
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He stayed quiet _______ the sake of peace.
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I will call you tonight ________ sure.
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“She accepted the award ______ behalf of her team.
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______ first, the class was difficult.
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If the teacher sees this, we are _______ trouble
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He started laughing ______ no reason.
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I eat fast food once _______ a while, but not often.
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Stop talking and come here _____ once!
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I go to the gym ____ a regular basis.
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You should drink _______ least 8 glasses of water a day.
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After buying the car, he was _______ debt.
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Let’s eat at home ______ a change.
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______ top of my job, I also study at night.
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When you are ______ doubt, ask the teacher.
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_____ average, students spend 2 hours on homework.
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She felt calm and ______ control of the situation.
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She wants to win the competition _____ all costs
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______ once, can you help me instead of playing video games?
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