题目

根据句子意思，用括号中所给单词的适当形式填空。 1. If I have a robot, I want to make him _________(do) the homework. 2. Someone attacked him with a knife and he bled to ________(die). 3. Tom _________(have) a walk with his dog every afternoon. 4. We spend half an hour ________(read) English every morning. 5. On _______(child) Day, every child will be happy to get the beautiful presents.维生素C主要存在于蔬菜和水果中，其化学式为．维生素的相对分子质量为_________，维生素中C、H、O元素的原子个数比是_________，C、H、O元素的质量比是_________．