I met my teacher _____ I was walking in the street, but I didn’t say hello to him.
Books are made __________ paper while paper is mainly made __________ wood.
We will see __________ even stronger China in __________ near future.
— There used to be lots of fish in the lake. — Yes, but there are very __________ now.
The theme park is about __________ ride from the museum. You should start out right now.
—I’ll fly to Qingdao for my holiday this weekend. —Wonderful! __________