A. running B. get into trouble C. silt D. Mr. A. made B. basketball C. carnivore D. twin A. be worried about B. open C. Pleased to meet you D. potassium A. nine B. painlessly C. ping-pong D. impatiently A. sit B. after class C. be good at D. become known as A. passenger B. ego C. fire extinguisher D. swim A. having class B. late C. twenty D. plea A. blot B. inmost C. interesting D. at night A. by coincidence B. differ C. roller skating D. be friends with A. couldn't B. longitude C. mask D. get up