don't give up (尽力)to help him 填空题 It is (有必要的)for him to have a talk with his parents 填空题we are helping the workers (清除) that dirty river 填空题----Who （knock）at the door?----l don't know .

来源：学生作业帮助网编辑：作业帮时间：2024/07/31 21:46:59

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don't give up ____ (尽力)to help him 填空题 It is ____ (有必要的)for him to have a talk with his parents 填空题we are helping the workers ____ ____ (清除) that dirty river 填空题----Who ____ （knock）at the door?----l don't know .

don't give up (尽力)to help him 填空题 It is (有必要的)for him to have a talk with his parents 填空题we are helping the workers (清除) that dirty river 填空题----Who （knock）at the door?----l don't know .