A. studied B. twenty-one C. labor D. string A. while B. outing C. in line with D. adviser A. first B. far C. walnut D. practice A. go climbing B. northwest C. stripe D. Children's Day A. easy-going B. assorted C. humidity D. August A. bed B. novelist C. read a book D. April A. school B. weekday C. in the evening D. hat A. Great Wall B. sick C. just right D. pollute A. anxious B. important C. cafeteria D. search A. strange B. illness C. bring D. than