15. The girl was killed unfortunately. She ________, though, but for the delayed treatment.

14. ________ know Jane was interested in art until I heard that she owned a Van Gogh.

13. I was frightened by the manager’s warning _______ I would be dismissed if I came late again.

12. We were having a chemistry class the other day when we heard a sound we _______ - the ring of a mobile phone.

11. When asked why he prefers bikes to buses, the professor said, “Riding a bicycle takes _______

half an hour, but it's more convenient and environmentally friendly."

10. My cousin is really enthusiastic about playing basketball. _______ he shoots a ball, he likes to think of himself as a Kobe Bryant.

9. The new tax would force companies to _______ energy-saving measures.

8. _______ in 1884, The Adventures of Huckleberry Finn by Mark Twain was one of the first novels in the USA written in common, everyday language.

7. Silence is requested in this area while the college entrance examination is ________.

6. - Did you enjoy meeting your old friends yesterday?

- Yes, I did．I _______ them since we graduated from college.