问题
选择题
—Could you go to buy some salt for me, Vince?
—I'd love to, Mum, but I ________ my homework.[ ]
A. do
B. did
C. am doing
D. was doing
答案
答案：C
搜题请搜索小程序“爱下问搜题”
—Could you go to buy some salt for me, Vince?
—I'd love to, Mum, but I ________ my homework.[ ]
A. do
B. did
C. am doing
D. was doing
答案：C
