27. What is something attendees will learn at the seminar?
(A) How to pay for a solar system.
(B) How to design a solar system.
(C) How to pay taxes on solar system.
(D) How to install solar systems at home by themselves.

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統計: A(24), B(3), C(24), D(10), E(0) #3125370

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【題組】27. What is som...
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