How many years does Cummins believe that students will need in order to be able to understand and talk in context-rich situations?
(A)about 4 years
(B)at least 5 years
(C)approximately 2 years
(D)about 9 years
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統計: A(5), B(11), C(33), D(5), E(0) #119843
統計: A(5), B(11), C(33), D(5), E(0) #119843