1樓：就是任性
你好，很高興為你解答，正確的答案是，
86. that is your new sweater.
87. how much does the piano costs?
88. we throw away lots of garbage every day.
89. there is no chair in the room.
90. she has already finished her homework.
希望能幫到你，如果有不明白的，歡迎追問，望採納。
2樓：瑤瑤瑤
is that your new sweater? /that is your new sweater.
how much does the piano cost?
we throw away lots of garbage every day.
there is no chair in the room.
she has already finished her homework.望採納
3樓：匿名使用者
86. that is your new sweater.
87. how much does the piano costs?
88. we throw away lots of garbage every day.
89. there is no chair in the room. (be 在句中形式是is)
90. she has already finished her homwork.
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