B. 1. discovered　 2. invented　 3. created　 4. invent

C. 1. anxious　 2. eager　 3. anxious　 4. eager

5. benefit　 6. violence　 7. encouragement　 8. murder

10. -Bob said he once got lost in the Sahara Desert and spent 180 days there before he finally found his way out.

-　　　　 ！No one could survive that long in the Sahara.

A. In other words　　　 B. That’s it

C. Exactly　　　　　　 D. Nonsense

9. 　　　　　　his help, we couldn’t have accomplished the task so easily.

A. Had it not been for

B. Were it not for

C. If there wasn’t

D. Not having for

8. The oil lamp 　　　　before they could find a pen to write the sentence down with, so they had to learn it by heart.

A. burned up　　　　 B. put out

C. burned out　　　 D. put up

7. The teacher didn’t agree to have his daughter in his class,　　　 　showing favour to her.

A. in case of　　　 B. with purpose of

C. in hope of　　　　 D. for fear of

6. For some reason the peace talks have　　　 　, meaning another war will break out soon.

A. broken down　　　 B. come out

C. gone through　　　 D. taken apart

5. I’m sorry. I took your umbrella . I just realized it when I got home.

A. by chance　　　　 B. on purpose

C. by mistake　　　　 D. by means