16 What is this passage mainly about?
(A)It is not complicated to build a toaster.
(B)It is not difficult to understand technology.
(C)It is not harmless to travel to another planet.
(D)It is not right to take technology for granted.
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統計: A(86), B(129), C(59), D(567), E(0) #1571179
統計: A(86), B(129), C(59), D(567), E(0) #1571179