— Shall we go out for a walk? — Sorry, I can't. I ______ my homework. [ ]A. do B. did C. am doi
[ ]
题目简介
— Shall we go out for a walk? — Sorry, I can't. I ______ my homework. [ ]A. do B. did C. am doi
题目详情
— Sorry, I can't. I ______ my homework.
[ ]
B. did
C. am doing
D. was doing
答案