【2013贵州安顺】In our school library there _____ a number of books on science, and in these years the number of them _____ growing larger and larger.
—When will the train ______ here?—In five minutes.
I usually ______ sunglasses outside in the sun.
The poor girl needs an operation. But it will ________ a lot of money.
It’s impolite __________others. Always wait politely.
---How can we help _________ people?--- We can help them cross the road.