46. According to the author, what is the reason that literacy has become a core skill in communication nowadays?
(A) Many new types of language use involve reading and writing.
(B) Schools education requires literacy in languages.
(C) Those who are illiterate cannot survive in the modern world.
(D) People need to be able to communicate within networks.

第一段、第一句

In past centuries, ..(中間略).. two, three of even more languages (or dialects) were largely illiterate in the sense of having difficulty in reading and writing texts printed on paper.

*dialects方言

*illiterate文盲

*oral-aural口說-聽力

*static靜止的；停滯的；不變的
staying in one place without moving, or not changing for a long time
Oil prices have remained static for the last few months.
靜電干擾
noise on a radio or television caused by electricity in the air
There's so much static on this radio I can't hear what they're saying.

*core
核心，關鍵，最重要的部分
the basic and most important part of something
The lack of government funding is at the core of the problem.
（水果的）核，心
the hard central part of some fruits, such as apples, that contains the seeds
Don't throw your apple core on the floor!
（星球的）核心，中心
the centre of a planet
The earth's core is a hot, molten mix of iron and nickel.
核心肌群
the muscles around your pelvis, hips, and abdomen that you use in most body movements
These exercises are designed to strengthen your core.

資料來源：劍橋辭典