11. It was _______ an interesting book that he couldn't put it down. A. such B. enough C. very D. so 12. She never let you cook the meals, ____________? A. didn't she B. doesnt she C. does she D. did she 13. Louis is virtually bilingual ____________Dutch and German. A. on B. in C. for D.with 14. My grandfather is the _______ oldest artisan in the village; Ngocs grandfather is the oldest. A. first B. second C. most D. one 15. He had to explain the lesson very clearly_______. A. since his students could understand it B. so that his students to understand it C. in order to his students to understand it D. in order that his students could understand it 16. At the age of 18, we have to ________ some very difficult decisions. A. make B. do C. put D. give 17. The man _______ last night is my brothers friend. A. you talked to him B. who you talked to him C. to him you talked D. whom you talked to 18. Yesterday, my mother bought a _______ toothbrush for me. A. new pink plastic B. pink new plastic C. plastic new pink D. new plastic pink 19. Conical hat making in the village has been passed _______ from generation to generation. A. on B. down C. up D. in 20. No sooner _______ arrived home than it rained heavily. A. had he B. has he been C. he has D. he had