【单项选择题】
When Lily came home at 5p.m. yesterday, her mother() dinner in the kitchen.
A、A.cooked
B、B.was cooking
C、C.cooks
D、D.had cooked
A、A.cooked
B、B.was cooking
C、C.cooks
D、D.had cooked
A、Jack一Sara,Tom一Linda,Henrry一Lily B、Jack一Sara,Tom~Lily,Henrry一Linda C、Jack一Linda,Tom一Lily,Henrry一Sara D、Jack一Lily,Tom一Sara,Henrry一Linda