Huang Wei rides a bike very well. Who taught him? —No one. He taught _________.
—________are you going to do during your holidays? -I’m going on a trip to Hainan.
—Will they send their homework _____ the teacher _____ email? —Yes, they will.
---________ did you spend on this book? ---Ten yuan.
Tom likes _____ but he _______ yesterday.
There are _________ people in the zoo.