A. be concerned about B. consist of C. biologist D. linguist A. power B. so long as C. laser D. the greenhouse effect A. cool B. calm C. load D. unbelievable A. excellent B. worst C. vet D. moor A. suffer B. silver C. anytime D. playing A. endow B. daylight C. fitness D. a series of A. chimp B. California C. reinforce D. thunder A. worthwhile B. German C. beaver D. Boston A. soccer B. drew C. Netherlands D. be born A. administrative B. finished C. infection D. dusty