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【題目】We have worked for two hours. Let's stop ________ a rest.

【題目】My parents and teachers always encourage me ________ what I like.

【題目】Helen spent three hours ________ the task. She is tired now.

【題目】Although my grandma is in her seventies, she is willing ________ new things.

【題目】They were required ________ singing before the competition.

【題目】Can I borrow your bike? I promise ________ it on time.

【題目】I get used to ________ down the notes, so I can find some important points after class.

【題目】Although the movie is a little long, it's worth ________.

【題目】It takes about 30 minutes _______ a bicycle from my home to school.

【題目】(2018唐山豐潤區一模)The driver stopped ________ after a longdistance driving.