问题
选择题
— Do you speak English after school?
— When we practice speaking English, we often end up _____ in Chinese. [ ]
A. to speak
B. speaking
C. spoken
D. speak
答案
答案：B
搜题请搜索小程序“爱下问搜题”
— Do you speak English after school?
— When we practice speaking English, we often end up _____ in Chinese. [ ]
A. to speak
B. speaking
C. spoken
D. speak
答案：B
”表示氢原子、“
”表示氧原子，则保持水的化学性质的粒子为（ ）
