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When and where this took place still unknown. a. has b. is c. were d. are 【查看更多】

 

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When and where this took place_________still unknown.

 A．a(chǎn)re   B．were  C．is   D．has

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When and where this took place _____ still unknown.

A. is                              B. has                                    C. were                                 D. are

 

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 When and where this took place _____ still unknown.

A. is                         B. has                         C. were                       D. are

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When and where this took place                still unknown.

　　      

A．a(chǎn)re

B．were

C．is

D．has

　　   　　   

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