16．A huge was lifted from my shoulders when I told my parents about my problems.
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A．burden
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B．risk
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C．hole
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D．disaster
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17．I before I came to the new school, for my classmates here are very friendly to me.
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A．mightn’t worry
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B．mightn’t have worried
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C．needn’t worry
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D．needn’t have worried
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18．There is no greater pleasure than lying on my back in the middle of the grassland, at the star.
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A．stare
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B．staring
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C．stared
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D．having stared
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