He was sent to Australia _______ when he was ten years old.
| A．to be educated | B．to educate | C．educating | D．to be educating |
The average price of commercial houses in our city has reduced by _____ 30 percent ,so we can buy one at _____ low price .
| A．the; the | B．the; / | C．/; a | D．/; the |
Have you checked all the CDs _______ to the mountainous area next week?
| A．sent | B．to be sent | C．sending | D．being sent |
The reason _______ he was absent from the meeting is_____ he suffered form a headache.
| A．what; because | B．for; that | C．why; that | D．when; because |
_______ to the sunlight for too long will do harm to your skin.
| A．Exposing | B．Exposed | C．Being exposed | D．Having exposed |
--- Congratulations!
---Thank you. If it hadn’t been for your help, we ____ in the experiment.
| A．will never succeed | B．wouldn’t have succeeded |
| C．mustn’t have succeeded | D．can’t have succeeded |