A. puzzled B. thank C. differently D. climber A. can B. laser C. concise D. family tree A. goodbye B. tube C. as soon as D. ball A. normal B. no idea C. it D. gasoline A. now B. be known as C. let down D. anger A. hands up B. Flag Day C. too D. latitude A. nightfall B. stop doing C. class D. mild A. newspaper B. wreath C. I D. my pleasure A. yes B. individual C. typesetting D. choke A. his B. the greenhouse effect C. play football D. insurmountable