—Do you know what EU stands for, Tommy?
—Sure.It stands for the European Union，________ European political and economic organization that encourages trade and friendship between ________ countries that are members.
A.an; the B.a; the
C.the; / D.an; /
It is announced that________$20,000 reward will be offered for ________ return of the stolen sculpture.
A.a; the B./; the
C.a; a D./; a
The most important thing to keep in ________ mind when dealing with________ emergency is to stay calm.
A. /; the B. the; an
C. the; the D. /; an
We can never expect ________ bluer sky unless we create________ less polluted world.
A. a; a B. a; the
C. the; a D. the; the
Failure to face up to painful experience can be ________ form of stress itself, and can increase ________ possibility of illness.
A. the; / B. a; a
C. a; the D. /; the
In________ most countries, a university degree can give you ________ flying start in life.
A. the; a B.the; /
C. /；/ D. /; a
