Results from a recent research indicate that daydreaming is means of relaxation.A. the;

问题补充：

Results from a recent research indicate that daydreaming is means of relaxation.

A. the; a

B. 不填; the

C. a; the

D. 不填; a

答案：

A. the; a

B. 不填; the

C. a; the

(答案→)D. 不填; a

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