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
This area experienced ________ heaviest rainfall in ________ month of May.
A．不填； a B．a ; the
C．the ; the D．the ; a
—What about ________ conference you attended last week?
—To tell the truth, it was too boring, you know, ________ conference like that.
A. a; the B. the; /
C. the; a D. the; the
In ________ early 1990's, as ________ gesture of appreciation, the library was named after the businessman who donated most of the money with which to build it.
A.the; a B.the; the
C./; the D．an; /
