The perfect accomplishment of Shenzhou-7 spacewalk mission is a powerful ________ to our country’s achievement, which has ________ our country’s status in the world．

1. A.
   evidence; enlarged
2. B.
   witness; promoted
3. C.
   abundance; increased
4. D.
   insurance;improved

The perfect accomplishment of Shenzhou - 7 spacewalk mission is a powerful _________ to our country's achievement, which has _________ our country's status in the world.

    A. evidence; enlarged                    B. witness; promoted

    C. abundance; increased                D. insurance; improved