14. We must work hard to _____ a good knowledge of English.

A. earn　　 　　　　 　B. acquire　　 　　　　　 C. give　　 　　　　　　 D. achieve

13. Who else can I depend on for help, if not ______?

A. he　　 　　　　　 　B. himself　 　　　 　　　 C. his　 　　　　　　　 D. him

12. - How you are looking!

- I’m really terrible! It has been one month ______ I ______.

A. since; fell ill　　　　 B. before; became ill　　 C. when; fell ill　 　　　　　　　 D. as; was ill

11. Knowing how to give first aid really ______ in case of emergency. It can save lives.

A. makes difference B. has a difference　　　　　　　 C. makes a difference　 D. makes the difference