问题
句型转换
句型转换。
1. He used to go swimming in this river. (改为一般疑问句)
_____ he _____ to go swimming in this river?
2. He used to be afraid of the dark. (对画线部分提问)
_____ _____ he _____ to be afraid of?
3. I have to study for the test. (对画线部分提问)
_____ _____ you have to _____ for?
4. My biggest problem is that I'm too busy. (对画线部分提问)
_____ _____ your biggest problem?
5. Tian Jun used to play football. (改为否定句)
Tian Jun _____ _____ to play football.
答案
1. Did; use 2. What did; use 3. What do; study 4. What; is 5. didn't use
s2np2，且X原子半径小于Q；②Y元素是地壳中含量最多的元素；W元素的电负性路小于Y元素，在W原子的价电子排布式中，p轨道上只有1个未成对电子；③Z元素的电离能数据见下表（kJ·mol-1）