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
669.答案是A;only/thus doing sth.位于句末，表示必然结果。
670.答案是D;第一空考查动名词作主语；在第二空中concerning是介词。
