We were lucky to have survived the train accident. _____, the first and last car were smashed.
| A．On top of this | B．What was worse | C．As it was | D．So it was |
You will be late _____ you leave immediately.
| A．unless | B．when | C．while | D．as |
Don’t leave your keys in the car. Someone might steal ________ .
| A．one | B．that | C．this | D．it |
we can avoid _________ with rest and a balanced diet.
| A．ill | B．to get ill | C．getting ill | D．be ill |
Expo 2010 Shanghai China __________ on both banks of the Huangpu River in the city of Shanghai, China, from May 1 to October 31, 2010.
| A．is being held | B．is holding | C．will hold | D．holds |
In fact, the chances of anybody ______ by a whale are rather low.
| A．being swallowed | B．swallowed | C．to be swallowed | D．having swallowed |