1b  2a  3a  4d  5c  6b  

1. you should visit that town. there are many interesting places _________ there. 
A. seeing
B. seen
C. see
D. to see
2. parents are responsible for providing the right environment, ________ there children can grow up well. 
A. that
B. in which
C. in that
D. by which
3. _________ Mr.Pike is getting married is a surprise! 
A. what
B. who
C. that
D. then 
4. Most of the world’s fresh water ______ at the North and South Poles. 
A. are frozen
B. freezing
C. is frozen
D. have been forzen
5. The winners were happy and the losers left ________.
A. to disappoint
B. disappointed
C. disappointing
D. disappointment
6. The patient has been feeling much beter since the doctor_______. 
A. came
B. comes
C. coming
D. had come

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