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【題目】Time n______ goes back. We should not waste it.

【題目】The question is so hard, but Jack has the right a_________. He is clever.

【題目】The Halloween party e________ at 11pm. It was too late when we got home.

【題目】I feel bad because of the two bad t_______. I have to see the dentist.

【題目】Some scientists say robots can help people do some cleaning in the f_______.

【題目】A good student should f_____ the school rules and have good learning habits.

【題目】—I’m going to Canada with my aunt this August for my holiday. ( )

【題目】There ________ any cars on the roads ten years ago. But now there ________ too many in the street. The traffic is always busy. ( )

【題目】Helen is good at ________. She has ________ lessons after school. ( )

【題目】When someone makes you feel bad or hurts you again and again, you must say NO and ________. ( )