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【題目】The factory is usually noisy, ________ it is pretty quiet today.

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【題目】Help others, ________ you'll feel happier.

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【題目】(2018保定競秀區(qū)二模) Last night I stayed up too late, ________ I'm really sleepy now.

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【題目】(2018長春改編) Work hard and be patient, ________ your dream won't come true.

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【題目】He kept going on his trip ________ he was very hungry and thirsty in the desert.

A.althoughB.whetherC.unlessD.as

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【題目】I didn't know the news ________ you told me. Thank you for telling me that.

A.becauseB.thoughC.untilD.while

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【題目】Be more careful and more patient, ________ you will make fewer mistakes in the following experiments.

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【題目】You can either email us ________ come to our office for your questions.

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【題目】Tony used to be a quiet student, ________ now he is active in class.

A.soB.andC.butD.or

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【題目】Help others in need, ________ they will help you when you are in trouble.

A.andB.butC.orD.nor

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