36. What does “it” in line 8 (paragraph 4) refer to?
(A) Lego
(B) Being alert
(C) Boredom
(D) Doodling
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統計: A(7), B(10), C(12), D(5), E(0) #1184772
統計: A(7), B(10), C(12), D(5), E(0) #1184772