A. before B. air conditioner C. particular D. excellent A. how many B. in vain C. assumption D. side A. go back B. the British Museum C. nature D. spacecraft A. hairy B. would C. dune D. unfit A. dad B. be similar to C. vein D. betray A. also B. sales department C. population D. teddy bear A. motto B. do morning exercises C. swimming D. email A. epidemic B. morality C. up to now D. today A. bulb B. towards C. interesting D. three A. potassium B. dining C. T-shirt D. e-dog