摘要：19．If we go on using energy so wastefully, are that our oil wells will be dried up, before new energy sources can be found to replace oil. A．difficulties B．chances C．questions D．problems
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If we go on using energy so wastefully, ________ are that our oil wells will be dried up before new energy sources can be found to replace oil.
- A.chances
- B.difficulties
- C.questions
- D.problems
If we go on using energy so wastefully, ______ are that our oil wells will be dried up ______ new
energy sources can be found to replace oil.
energy sources can be found to replace oil.
[ ]
A. chances; before
B. difficulties; after
C. questions; since
D. problems; as
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B. difficulties; after
C. questions; since
D. problems; as
If we go on using energy so wastefully, _____ are that our oil wells will be dried up before new
energy sources can be found to replace oil.
energy sources can be found to replace oil.
[ ]
A. chances
B. difficulties
C. questions
D. problems
查看习题详情和答案>>
B. difficulties
C. questions
D. problems