Beijing is one of the ______ in the world today.
| A．busiest cities | B．busiest city |
| C．busy city | D．busy cities |
He is not used _______out before breakfast.
| A．goes | B．going | C．to going | D．to go |
The sick man_______to hospital by the policeman an hour ago.
| A．is taken | B．was taken | C．takes | D．took |
Mum, I’m hungry now I didn’t have breakfast this morning.
| A．because | B．because of | C．and | D．but |
Each year quite a lot of food________ around the world.
| A．was wasted | B．is wasted |
| C．wasted | D．will be wasted |
Earth Day_______in 1970 to tell us to protect our planet.
| A．sets up | B．set up |
| C．is set up | D．was set up |