I am sorry, sir, but that kind of digital camera is no longer _______.

I’m not sure if I’m going to Tim’s party; I may go to the concert .

Thanks to Dr Yuan’s research, the UN has more tools in the battle to rid the world _____ hunger

The exhibition tells us we should do something to stop air pollution.

It’s a custom in China to have some tea or other drinks before the meal ________ . [ ]