There is no exact definition of word “happiness”. People are happy for all sorts of reasons.
| A．/; the | B．a; the | C．the; a | D．/; a |
The hostess left the money on the table _____purpose to test the honesty of her maid.
| A．with | B．in | C．on | D．for |
People in ancient times ______ series of important events so that we now have what is called history.
| A．went down | B．kept down | C．set down | D．broke down |
It was the first time ______ I ______ here.
| A．when; had come | B．that; have been | C．when; came | D．that; had been |
Remember never to leave your dog ______. It might bite people around.
| A．lose | B．lost | C．losing | D．loose |
_____ of the students who took part in the military training is 450.
| A．A number | B．A lot | C．Lots | D．The number |