When he knocked at the door, my mother was busy ____ supper.
1个回答
B
“be busy (in)doing something”忙于干谋士,要求接动词的-ing形式。准备的直接宾语是“supper”,故其前面不用介词for。
相关问题
When he knocked at the door,my aunt was ________ (cook) dinn
He was just falling asleep when someone knocked at the door.
he_asleep when there_aloud knock at the door. A was just fal
when he wpke up,he heard the_of knocking at the door.
WHEN I WAS READING I HEARD SOMEONE -----(KNOCK)AT THE DOOR
When he woke up,he heard the ___of knocking at the door.A.so
When I was in the bathroom sally knocked at the door.错在哪里?
What were you doing when someone knock at the door?I was hav
He heard a ___ knock at the door.
My mother was busy_?_the housework when i got home