It is essential that everything in advance.（）

In studio recordings, new techniques made possible effects that not even an electronic band could produce .

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

Decision makers must have some way of determining of several alternatives is best.（）

the bosses cannot do without profit, workers have an edge.

A good worker in a key spot could, he kept up production, take all the coffee breaks he wanted, and the bosses would very likely look the other way.

Let ’s personal feelings in making judgment.（）

Mrs. Weinstein bravely and persistently used every skill and power she had to her attacker to simply take her car and not her life.

Some students from asking questions in class.（）

The fixed star was a planet.（）