30.The earth’s oil reserves are expected to be ________ in 50 years. Thus, countries around the world have been trying to find new energy sources.
(A) retired
(B) exhausted
(C) recovered
(D) predicted

答案：登入後查看
統計： A(424), B(4913), C(388), D(337), E(0) #666300

詳解 (共 2 筆)

#962067

A:退休
B:用盡
C:恢復
D:預測

64
1
#963054
地球上的石油儲量預計 50 年後是 ___。因此，世界各國已試圖找到新的能源來源。
19
1