阿摩線上測驗
49. The passage is mainly about
(A) how astronauts fly the space shuttle.
(B) how a space mission is completed.
(C) how a space shuttle is constructed.
(D) how far astronauts travel in space.
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統計： A(9), B(34), C(5), D(2), E(0) #629318
統計： A(9), B(34), C(5), D(2), E(0) #629318