In order to find _______ better job, he decided to study _________ second foreign language.
A. the; a B. a; a C. the; the D. a; the
The biggest whale is ___ blue whale, which grows to be about 29 meters long—the height of ___ 9-story building.
A. the; the B. a; a C. a; the D. the; a
We can never expect bluer sky unless we create less polluted world.
A. a; a B. a; the
C. the; a D. the; the
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
A. /; the B. the; / C. an; the D. the; a
This area experienced. heaviest rainfall in month of May.
A. 不填; A. B. a; the C. the; the D. the; a
What I need is _____ book that contains _____ ABC of oil painting.
A. a；不填 B. the; 不填 C. the; an D. a; the
