6. Astronomers are always _____ for new asteroids, and follow the known near-Earth asteroids closely, so they can predict a possible collision as early as possible.
(A) in the vicinity of
(B) in the grip of
(C) on the lookout for
(D) at the disposal of

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統計： A(9), B(15), C(45), D(1), E(0) #3224445

詳解 (共 2 筆)

#6072933
題目翻譯如下：  "天文學家總是___...
(共 691 字，隱藏中）
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10
0
#6340627
6. Astronomers are ...
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2
0