题目

用方框中所给单词的适当形式填空, 每词限用一次。 value    shelf    sail     activity     skill 1. Reading and writing are important . 2. In summer Li Lin often goeswith his friends. 3. My father bought me adigital camera as a birthday present. 4. We hope we can have more time to take part in all kinds ofafter class. 5. There’re twoin the bedroom. One is for me, and the other is for my brother.11．生物体的生命活动离不开水，下列叙述错误的是（　　）A．水是农作物光合作用所必需的原料B．在有氧呼吸过程中，水既是反应物又是生成物C．休眠或越冬的植物体内结合水与自由水比值下降D．如果白天用含18O的水浇花草，周围空气中的H2O、O2中都可能检测出18O