Can earthquakes be predicted The underlined part means “________”.

________— My arms hurt.

You have to show ____ student card to the librarian before borrowing books.

— Do you know anything about the school? — Yes. In fact, this is the third time I _____here. [ ]

When it _____ air pollution, Beijing faces the 3 “C” s: cars, coal and construction, which lead to Beijing’sserious air pollution.