Mary often does some translation work to earn extra money, which______half of her income. (潍坊市)
There is a real possibility that these animals could be frightened, ________ a sudden loud noise.
–This summer is very hot. --Yes, but it’s not __________ as hot as last summer.
Our teacher entered the classroom, __________.
–What do you think the noise was? --It ___________ a cat.
Do you know the _________ of the saying I just quoted?