choose the best option to complete the following sentences
1.I have known her .................. two years.
   A. with            B. for           C. since            D. in
2. He .......... many old books for 5 years.
   A. recycled           B. is recycled             C. has recycled            D. will recycle
3. To prepare for the new year, I ............ my house again since last month.
   A. paint           B. painted           C. have painted            D. has painted
4. They ............. the used plastic bottles with water several times yesterday.
   A. washed          B. is washed            C. are washed            D. were washed
5. It is dangerous ............... quickly.
   A. driving           B. drove           C. to drive           D. driven
6. I like .......................... to my friends in my free time.
   A. talk            B. talking             C. talked              D. to talking