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

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

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

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

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

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

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

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

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

【题目】(2018唐山丰润区一模)The driver stopped ________ after a longdistance driving.