摘要： The research is so designed that once nothing can be done to change it. A. begins B. having begun C. beginning D. begun
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(NMET 2002)The research is so designed that once ________ nothing can be done to change it.
[ ]
A．begins
B．having begun
C．beginning
D．begun
22.[2002全国] The research is so designed that once ________ nothing can be done to change it.
|
A. begins |
B. having begun |
C. beginning |
D. begun |
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22.[2002全国] The research is so designed that once
________ nothing can be done to change it.
|
A. begins |
B. having begun |
C. beginning |
D. begun |
查看习题详情和答案>>