He warmly congratulated them on they had achieved in science and technology. A. that B. where C. what D. which 查看更多

 

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He warmly congratulated them on _____ they had achieved in science and technology.

     A. that                         B. where                      C. what                        D. which

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He warmly congratulated them on _____ they had achieved in science and technology.

A. that                          B. where                      C. what                        D. which

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He warmly congratulated them on _____ they had achieved in science and technology.

A.that

B.where

C.what

D.which

 

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