Would it be ____for you to pick me up at four o’clock and take me to the airport?

There were no tickets __________ for Friday’s performance.

As a manager, I know my emotions will affect people around me, so I’m going to make a _______ effort to be more cheerful.

29．The police tried to get some clues from the suspect, but he remained________

The population of China ___ than ___ of any other country in the world.