1.when i walked past her room,I heard her ()an english songs A,singing B,was singing c,sang2.most girls (are scared of )the snakes.中scared表过去吗?那为什么be动词不用变?1,可这不是过去进行时吗？我选的B正确答案A为何？

I saw an old man _____(lie) on the around when I walked past when I walked past her room I saw her ( ) clothes .(iron) I saw Betty_____(read)in the classroom when I walked past. I found many fresh vegetables when I walked-----marketAthroughB acrossC past选什么 When I walked past his window,he didn't stop ______(look) at me The poor lady who was robbed ___(scream)for help when I walked past. The poor lady who was robbed ___(scream)for help when I walked past. time has past I walked liked the When I walked past the park,I saw s ome people(When I walked past the park,I saw some people( )Chinese Taiji.A.didB.to doC.are doingD.doing i ______ the traffic addident when i ______ past the buildingsAsee;wslking Bsaw;walked Csees;walking Dsaw;was walking i saw a piece of glass fall down when i walked past the office为什么不用falling down They were heard ____（sing）when I walked past.They were heard ____（sing）every morning. When she__ ,she gave me a smile.A.past B.walked passed C.walked past D.passes I saw an old man ____(lie)on the ground when I walked past.这里为什么要用lie的过去分词 I noticed a little boy()at the corner when I walked past the houseA.cry B.crying C.cried D.to crt When I walked past his office at 11 o'clock last night,I saw the lights in it still___.a.in b.on c.at d.off I saw them( )basketball when I walked past the playground just now A were playing B piayingC cheaper,much D cheap,more(解析 （初中英语）I saw Jack（）soccer there when I walked past the playground.A.to playB.playingC.playedD.play能不能选C,为什么,要有解析.