A/An _______ is an unusual, exciting or dangerous experience.
A. advantage
B. research
C. adventure
---I felt very nervous before the exam.
---Take it easy. I believe you can do better this time.
A. happy
B. anxious
C. surprised
When you cross the crossroads in the street, you need to guard against accidents.
A. protect yourself from
B. suffer from
C. keep in touch with
Why should we protect animals?
If not, they will die out.
A. disappear B. remain C. leave
The world’s population is increasing fast.
A. showing B. giving C. growing
--- What have you decided to be?
--- A scientist.
A. thought of
B. made up your mind
C. gone on
