Ⅰ.根据首字母或括号内提示写出单词的正确形式
1. She used to conduct an o________ of forty instruments.
2. The new program aims to create such conditions in which those p________ would realize that to grow this kind of plant in the area is more profitable.
3．As we all know, Mozart was a musical g________， who started composing music at the age of 5.
4．The c________ was singing obviously out of tune in places.
