A. operate B. star in C. regret D. score A. tend B. stomachache C. trust D. quite a few A. introduce B. climbing C. man-made D. body A. keep fit B. separate C. Moscow D. evolve A. glue B. specially C. nightfall D. license A. loud B. shady C. evaluation D. treat A. go to a summer camp B. U-turn C. hot D. include A. take a breath B. patient C. reject D. go well A. reading B. herself C. jeans D. interminably A. humorous B. nutrient C. lychee D. bright