they were playing on the computer__their teacher came in.A.when B.until C.while D.after这道题选A,请问为什么不能选until或者after,如果能系统讲解更好

they were playing volleyball on the beach yesterday.为什么过去式用“playing”ing形式? Were they all playing games?如何回答 Though it rained heavily,( ) were still playing on the playground.A.they B.them C.their D.themselves谢谢啦~ Though it rained heavily,____ were still playing on the playground.A.they B.them C.theirD.themselves They were playing on the slide,landing on the green grass.1）请问分词得主语是哪个?是They还是slide They s___ they were playing football against Class Three. 英语翻译3、They were much smaller than the pellican 4、Several girls were playing volleyball on the other side of the playground ,when we had our lunch. they on are games playing playground the 英语翻译Biff and Chip were playing with wilfand wilma.They were playing in the sandpit.magic I saw they were playing basketball on the playground.（改为简单句） I saw _____ _____ basketball on the playground. On Sundays there were a lot of children playing in the park,____parents seated together joking.为什么填 they?独立主格结构 请仔细分析下, I Were playing some ridiculousariati on football的中文意思I were playing some ridiculous variation on football We were playing happily on the playground(同义句) We were ___ ___ on the playground They were on a long journey翻译 they were closing in on a deal. ____the moment they are playing on the playground 填介词 They are playing football on the playground 改否定句 they are playing basketball ( on the field)对括号提问.