A、It’s difficult to find the right wooden materials. B、It’s quite easy to make a small organ. C、It takes a longer time to test a

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问题  

选项 A、It’s difficult to find the right wooden materials.
B、It’s quite easy to make a small organ.
C、It takes a longer time to test an organ than build it.
D、The high cost of building an organ is worthwhile.

答案D

解析
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