He heard a ___ knock at the door.
When he heard a knock at the door,he went ___ quickly.
英语分析,he heard a knock at the door .he 是主语,heard 是谓语,a knock
while he was reading the letter,he heard a knock at the door
when he heard a knock at the door ,he went _____ quickly
No sooner_____asleep than she heard a knock at the door
[-A75] After a knock at the door,the child heard his mother'
After a knock at the door ,the child heard his mother’s voic
After a knock at the door,the child heard his mother's voice
after a knock at the door,the child heard his mother' voice_
i was about to go to bed()I heard a knock at the door
knock at the door
have you heard someone knock at the door?为什么是knock,不是knoking