Lucy is singing ____ lily is dancing AwhenB whileC before D after

Lucy is singing ____ lily is dancing AwhenB whileC before D after Lily is singing.Lucy is singing,too.合并成一句 lucy is famous for singing.lucy is known ()for singing 同义句改写 Lucy is a l___ girl.she likes singing and dancing Lucy is a l___ girl.she likes singing and dancing Lily is better than Lucy ___ singing.空中填介词 Lucy is careful.Lily is ____ (careful) than Lucy. Lucy is also crazy about singing and dancing.Lucy is________ ________in singing and dancing too.同义句 Is she ____?,she is loud.She is singing. The girl [under the desk] is Lucy(对划线部分提问) ____ ____ is Lucy? 把Lucy,is Lily in?改为同义句：Is Lily ____ ____ ,Lucy? Lucy and Lily are the twins.Lucy is taller.（改为同义句子） Lucy is ____ ____ of the twins. Listen!Who ____?A.singing B.is sing C.is singing lucy is much better than lily at后加什么singing还是sin 2.Listen!Someone ____ in the next room.A.sing B.singing C.is singing D.are singing Hello,may I ____ to Lucy?Yes,this is Lucy speaking.______ is that? Lucy is five years old.Linda is ten years old.Linda is_____ Lucy's ____. Lucy is 14 years old（改为同义句 Lucy is a ____ girlLucy is 14 years old（改为同义句Lucy is a ____ girl