Great changes _______ in China in the past 20 years.
| A．took place | B．have taken place |
| C．were taken place | D．have been taken place |
________ your report, what is most important to protect our environment ?
| A．As a result of | B．Because of | C．With the help of | D．According to |
My father always shouts at me because he is a man with little _________.
| A．energy | B．courage | C．patience | D．freedom |
—What ____ you to get bored with her?
—_____was her laziness and unkindness.
| A．made; It | B．caused; That | C．led; It | D．got; That |
The woman was about to open the door _______ she heard a strange sound from inside.
| A．as | B．while | C．when | D．then |
The reason_____ she gave for not being present was _____the heavy snow prevented her coming.
| A．why; because | B．why; whether | C．that; that | D．how; that |