题目

用方框中所给短语的适当形式填空 clean up, do with, tons of, throw away, turn off （1） What do you the bottles when they are empty? （2） People will the lights as soon as Earth Hour comes. （3） Remember that having dollars won't help you if you're not healthy. （4） Do not what we don't want. Maybe it'll be reused later. （5） We must our classroom every day.单细胞生物是生物科研的理想材料，这是由于单细胞生物A. 易培养，繁殖快 B. 种类多，都对健康有害C. 体积小，数量少 D. 较低等，都没有细胞核