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 解析:句中once begun作状语.相当于一个条件状语从句once it is begun.而主句的主语the research与begin是动宾关系.所以答案D是正确的.
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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>>