题目

某同学用空塑料瓶、小卵石、石英沙、活性炭、膨松棉制作简易净水器后，再用浑浊的河水试验效果．这一做法属于科学探究过程中的（ ） A . 猜想 B . 交流 C . 实验 D . 查阅资料 答案：C句型转换。1. Why don't you go boating on the river? (改为同义句)  ______  ______ go boating on the river?2. Bill sat next to him in the classroom. (改为一般疑问句)  ______ Bill ______ next to him in the classroom?3. My sister is helping my mother wash clothes now. (用just now替换now)  My sister _____ my mother wash clothes ______  ______.4. Please tell me, "Why does Sally miss her parents?" (连成含宾语从句的复合句)  Please tell me ______  ______  _______  ______  _______.5. I wanted to know, "Is he doing his homework?"  (连成含宾语从句的复合句)  I wanted to know ______  ______  _______  _______ his homework.