19.
(A) to depend
(B) depend
(C) depending
(D) dependent

答案：登入後查看
統計： A(97), B(1006), C(1614), D(95), E(0) #2403090

詳解 (共 3 筆)

#5047497

The colors, ranging from purple to green, depend on the altitude of oxygen and nitrogen (which is) penetrated by solar energy.

整句沒有動詞，所以是depend

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The colors, ranging ...
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