阿摩線上測驗
18. A biologist does not merely describe organisms, but tries to learn ______ act as they do.
(A) what causes them to
(B) causes them to what
(C) what to cause them
(D) what cause to them
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統計： A(39), B(0), C(3), D(0), E(0) #2344741
統計： A(39), B(0), C(3), D(0), E(0) #2344741