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669.After the Shenzhou 4 capsule touched down,two astronauts succeeded in traveling around the earth,thus again _____ China is a global space power.
A.proving
B.to prove
C.to have proved
D.being proved
670.______ the right decision _____ the future is probably the most important thing we will ever do in our life.
A.Making;concerned
B.Make;concerning
C.To make;concerned
D.Making;concerning
