They___the computer.A.don't need buy B.needn't to buy C.don't need to buy D.don't need buying为啥？

They___the computer.A.don't need buy B.needn't to buy C.don't need to buy D.don't need buying为啥？ computer, computer They___the train until it disappeared in the distance .为什么用watched而不是saw They___the tram untik it disappeared in the distance.A.watchedB.observed 他们以这个科学家的名字命名了这颗星星.翻译They___the star____this____. --Hi,Tracy,what are your parents doing?--They___the living room the whole morning--Hi,Tracy,what are your parents doing?--They___the living room the whole morning.A.will paint B.had painted C.have been painting D.was paintig They___the desk___a piece of paper.A cover,to B covered,to C covered,with D covered,on they___the idea that children could learn to read as babies.A.thought B.introduced C.invented D.discovered computer译 computer发音 Play computer piay computer my computer , computer room play computer computer是什么意思 computer是什么意思