They appear_____in the accident.They appear_____in the accidentA to injure B to be injuredC to have been injured D being injured为什么选C不选B,谁能解释下这4个选项的区别.

They appear_____in the accident.They appear_____in the accidentA to injure B to be injuredC to have been injured D being injured为什么选C不选B,谁能解释下这4个选项的区别. They've They haven’t Don't they?不是 they don't They weren't old They just don't don't they They can't walk. they woundn't NO,they aren't.they're lions. They Do,They Don'T 歌词 They Do,They Don'T 歌词 No,they don't.They're They are drinking wine,aren't they? were they young yes ,they were./no,they weren't . They aren't ______ books .They are yours.(they) No,they aren't是什么意思 ()()sad?No,they aren't No,they aren't单数