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ming C. swimming。 on B. at。 in ( )5. It means “No parking”. You cannot ______. A. litter here B. smoke here. C. park your car here ( )6. These signs______ different things. A. means B. mean C. meaning ( )7. The sign means the floor is ______. You should walk carefully. A. dirty B. clean C. wet ( ) home last night. A . doesn’t B. isn’t C. didn’t ( )9. Grandma is sleeping. We______ shout. A. should B. shouldn’t C. can ( )10. What______ you______? I’m watching TV. A. did。 doing C. am。 (’6=3’) ( )1. Look, there’s a ____there. It means we can’t _____in this room. We should be quiet. ( )2. The sign in the street means we can’t______ right. ( )3. Do you______ the sign over there? Yes, I do. ( )4. Can I ______here? No, you can’t. Look at that sign, please. ( )5. I like______ very much. ( )6. Tina, ______are you so happy today? 七、用所給單詞的正確形式填空。 You ________ _______ the rubbish _______ the bin. 。 Trees help __________ the air ___________. We should and . 們應(yīng)當(dāng)熱愛并保護(hù)地球 We should and the . . Don’t waste . 十、按要求改寫下列句子。( (’10=5’)) 1. A: Look! What are they ? B: They’re in the river. A: Can we do it? B: No, we . We should the water clean. 2. A: Can we down too trees? B: No, we . A: Why? B: Trees can keep the air . A: What can we use the wood to do? B: We can use the wood to tables, chairs a