—Can I pay the bill by check?--- Sorry, sir. But it is the management rules of our hotel that payment ____ be made in cash.
---“Why do you have to be there at six?” ---“The teacher demands that everyone _____in his seat at six.”
Some people waste a lot of food ____ others haven't enough to eat.
The new tax would force companies to __________energy-saving measures.
It is generally believed that constant reading and comprehending can ______ our mental ability of comprehension while physical exercise can help build up our body.
Shortly after the accident two ____ policemen were sent to the spot to keep order.