---Do you know ____________ the population of China is?---Yes, it has the __________ population in the world, about 1.3 billion.
Do you know the man_______ glasses?
Dad, my trousers are old. I want to buy a new ________.
Tom needs some help ________ his homework. Can you help ________?
It’s important __________.
--- Would you like hamburgers?--- Yes, and chips, too