Ⅰ. 用所给词的适当形式填空
1. Sex education is a sensitive area for some parents, and thus it should remain optional (option).
2. In a written apology (apologise), the BBC admitted they had misled the public.
3. The dog barks (bark) fiercely the moment he sees strangers.
4. If you are not familiar with the travel routes, you can consult the travel agents (agent), who are willing to give you some help.
5. His car wouldn’t start. After a careful check, he found the batteries (battery) were flat.
6. They are drilling (drill) for oil off the Australian coast.
7. Our government (govern) is taking effective measures to make up for the loss.
8. I feel sorry for the caged (cage) birds.
