The two companies decided to （ ） on a project concerning animal cloning.

His fellow workers saw him fall down and blood came out from the open（ ） .

I have bought _____ useful reference books _____ I don’t know which one to start with.

—Do you like pop music or country music? —（ ）. I only like sports.

There are many fashion shops and expensive restaurants on （ ） sides of the street.

He studies so hard to avoid （ ） at the bottom of the class.

Take your time and think the matter over before you _____ a conclusion.

—Did you enjoy the party? —Yes. We （ ） well by our hosts.

The department head insisted that he _____ absolute authority to regulate office work.

I suppose you couldn’t let me borrow your car this evening, （ ）?

A new technique （ ）, the output as a whole increased by 20 percent.

I was now in a relaxed mood and had no desire （ ） the man make a fool of himself.