Lin Tao is good at (playing)football为什么括号填ing形式

问题描述:

Lin Tao is good at (playing)football为什么括号填ing形式
Let the twins(do)it.为什么填原形
Have they finished the(operation)为什么括号填名词形式

正确答案为:
1 playing ( be good at doing 擅长做某事 )
2 do ( let sb do 让某人做某事 )
3 operation ( finish sth 完成某事)