选择正确的词完成句子
1.The old lady complained____(around/about)the poor living conditions.
2.The customer complained_____(about/that)the poor quality of the goods.
3.The boy complained_____(about/that)he was ill treated at school.
4.She complained_____(of/that)the pain.
5.We have had a complaint _____(from/for) one of our clients.
6.There is a knock____(at/in)the door.
7.The man was knocked_____(off/down)by a car and was taken to hospital.
8.We normally knock_____(on/off) at 6:30 in the evening.
9.He knocked____(at/in)my door and then left.
10.They were completely knocked _____(down/out) after working all day.