40. ______ increasing needs for food all over the world due to rapid growth of population.
(A)It is
(B)They are
(C)There is
(D)There are
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統計: A(19), B(0), C(17), D(41), E(0) #678655
統計: A(19), B(0), C(17), D(41), E(0) #678655