17 Many ____________come into being when someone is looking for a faster, easier, or better way of doing something. They are results of years of planning and hard work.
(A) instants
(B) increases
(C) interviews
(D) inventions
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統計: A(94), B(76), C(217), D(1083), E(0) #1783272
統計: A(94), B(76), C(217), D(1083), E(0) #1783272