In August 1977, a satellite（）to gather data about the 10 million black holes which are hought to be in the Milky Way.

单项选择题Decision makers must have some way of determining（）of several alternatives is best.

A.that
B.it
C.one
D.which

单项选择题（）the bosses cannot do without profit, workers have an edge.

A.Though
B.For
C.Since
D.So