19. Most animals have little connection with animals of a different kind, ________ they hunt them for food.

A. if　　　　　　　 B. while　　　　　　　　 C. unless　　　　　 D. as

18. ________ , I have to put it away and focus my attention on study this week.

A. However the story is amusing　　　　　　 B. No matter amusing the story is

C. However amusing the story is　　　　　　　 D. No matter how the story is amusing

17. Mr. Saddam Hussein had to go with the American soldiers, ________ .

A. no matter he likes or not　　　　　　　　 B. no matter he should like it or not

C. no matter whether he likes or not　　　　 D. no matter he may like it or not

16. Most of his great novels and plays were not published or known to the public ________ his tragic death in 1786.

A. even before　　　B. ever since　　　　　 C. until after　　D. until before

15. We were just ________ calling you up ________ you came in.

A. about; when　　　　　　　　　　　　　　 B. on the point of; while

C. on the point of; when　　　　　　　　　 D. on the point of; as

14. I got in touch with Charles ________ I received his letter.

A. when immediately　B. soon　　　　　　　　 C. immediately　　D. suddenly

13. Much hard ________ he tried，he flailed to catch up with the first runner.

A. although　　　　 B. as　　　　　　　　　 C. while　　　　 D. when

12. Hard-working though he was, ________ there was never enough money to pay the bills.

A. /　　　　　　　　B. and　　　　　　　　　 C. but　　　　　D. therefore

11. ________ we gave him something to eat, he would save it up for his little sister.

A. Whatever　　　　B. However　　　　　　 C. Whenever　　　D. Whichever

10.Nowadays more and more people are advised to arrange for insurance _______ they or their family members need medical treatment.　

A so that　　　　　 B. in order that　　　 C in case　　　 D no wonder that