21、________ , the port will have an annual handing volume of 10 million tons of cargo.

A. When it will be completed                      B. When is completed

C. When it is completed                             D. When being completed

21、C

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________ , the port will have an annual handing volume of 10 million tons of cargo.

A. When it will be completed                      B. When is completed

C. When it is completed                             D. When being completed

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