Numbers of terrorists attacks in the past few years have signaled that anti-terrorism rema

问题补充：

Numbers of terrorists attacks in the past few years have signaled that anti-terrorism remains long term goal for world.

A. a; a

B. the; a

C. a; the

D. the; the

答案：

A. a; a

B. the; a

(答案→)C. a; the

D. the; the

解析：考查冠词。remain/keep … a goal意为“以……为目标”；the world为独一无二的事物。选C。