用括号内所给单词的适当形式填空。 1. Sally"s school orchestra is _____ (play) it. 2. What about _____ (listen) to the concert? 3. Mr. Wang is our English teacher, so he likes _____ (west) classical music. 4. His sister _____ (go) to America, hasn"t she? 5. How many _____ (composer) are there in the hall?