—Mr Hu, can you tell us how to learn math well?—Sure. But remember nothing can be learned _________ hard work.
He asked me______________.
Loud music and other noises can annoy neighbors, _________ at night.
---How was _________ dinner at Li Lei’s house?---It was great. Li Lei’s mum is ________ wonderful cook.
The people there are surfing the Internet, ______?
________ of the students in our class is 64, and ________ of them are girls.