10. After my teacher retired, he worked as a______ in an orphanage and devoted most of his time to the children
there. (A) patient (B) vegetarian (C) lawmaker (D) volunteer
10. I did not have enough sleep last night, so I lost my _______ and fell asleep in class.
(A) concentration (B) description (C) installation (D) prevention
11. I didn’t have enough sleep last night, so I lost my ______ and fell asleep in class.
(A) appointment (B) disturbance (C) concentration (D) boundary
6. If Jessica hadn’t helped me, I _______ the assignment in time.
(A) will finish (B) will be finished (C) would be finished (D) wouldn’t have finished
13. The author _______ all the adventures he experienced while traveling in Africa in his latest book. There are many exciting
descriptions of the adventures.
(A) coincided (B) detailed (C) observed (D) announced
19. My son ______ the piano since he ______ five. It’ s a pity that he doesn’t play it now.
(A) played; had been (B) was playing; has been (C) has played; was (D) had played; was