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It was on October 1st ____ new China was founded.

A. which         B. when            C. as                  D. that

It was on October 1st ____ new China was founded.

A. which               B. when                                C. as                            D. that

It was on October 1st _____ new China was founded.

A. which　　　　  B. that　　　　　  C. when　　　　　　D. as

It was on October 1st _____ new China was founded.

A．which　　　　     B．that　　　　　     C．when             D．a(chǎn)s

It was on October 1st ________ new China was founded.

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