-When Lily came home at 5 p.m. yesterday, her mother_____dinner in the kitchen.
A.cooked
B.was cooking
C.cooks
D.has cooked
正确答案是B
-When Lily came home at 5 p.m. yesterday, her mother_____dinner in the kitchen.
A.cooked
B.was cooking
C.cooks
D.has cooked
正确答案是B