Why not ride bicycles to the countryside with us this weekend? I’m sure you will enjoy yourself and come across the unexpected things.
| A．search | B．discover | C．explore | D．desert |
The school offers many _____ activities for the local students.
| A．infectious | B．recreational |
| C．fragile | D．vocational |
It is ______ that the noise around us is a(n) _______ to our health and well being.
| A．preventable; precaution | B．denial; existence |
| C．undeniable; hazard | D．vital; culprit |
We can broaden our horizons through _________ to new things.
| A．hazard | B．exposure | C．recreation | D．vapor |
Jack’s house has been broken into twice and now he takes________ against theft
at any time.
| A．risks | B．chances | C．turns | D．precautions |
The environmental organization calls on customers not to purchase these _______ packages of food, clothes and gifts.
| A．intrusive | B．cognitive |
| C．excessive | D．sensitive |