首页 › 答案 › 题库 › 远程教育 › 国家开放大学

When Lily came home at 5 p. m. yesterday, her mother ()dinner in the kitchen.

When Lily came home at 5 p. m. yesterday, her mother ()dinner in the kitchen.
B.A.cooked
B.was cooking
C.cooks
D.has cooked
正确答案:B