A. weather forecast B. bamboo C. spring D. curtain A. education B. stone C. concoction D. motorbike A. to B. sea C. North American D. Mr. A. sun B. yet C. spark D. spider A. ascertain B. island C. drag D. pork A. interesting B. pregnant C. clearly D. flower A. navigator B. oilfield C. pull-up D. sky A. look after B. pedestrian C. hill D. photograph A. try one's best B. river C. give sb a ride D. help out A. cloud B. straw C. laptop D. human race