.In summer of 1963 Martin Luther King Jr. gave speech to many black people.A. 不填; aB. 不填

问题补充：

.

In summer of 1963 Martin Luther King Jr. gave speech to many black people.

A. 不填; a

B. 不填; the

C. the; the

D. the; a

答案：

A. 不填; a

B. 不填; the

C. the; the

(答案→)D. the; a

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