WE MIGHT STOP HERE IF YOU DON'T CHANGE YOUR WAY OF SPEAKING.A. WE MIG...

Câu 20: We might stop here if you don't change your way of speaking.

A. We might stop here unless you change your way of speaking.

B. We might stop here if you change your way of speaking.

C. We might stop here if not you change your way of speaking.

D. We might stop here unless you don't change your way of speaking.

Read the following passage and blacken the letter A, B, C or D on your answer sheet to

indicate the correct word for each of the blanks in the following question.

Library is a collection of books and other informational materials made available to people

for reading, study, or reference. The word library comes from liber, the Latin word for "book"

(21) ____________ library collections have almost always contained a variety of materials.

Contemporary libraries maintain collections that include not only printed materials such as

manuscripts, books, newspapers, and magazines, but also audio-visual and online databases. In

addition, to maintaining collections within library buildings, modern libraries often feature

telecommunications links that provide users with access to information at remote sites.

The central mission of a library is to collect, organize, preserve, and provide access to

knowledge and information. In fulfilling this mission, libraries preserve a valuable record of

culture that can be passed down to (22) ___ generations Libraries are an essential link in this

communication between the past, present, and future. Whether the cultural record is contained

in books or in electronic formats, libraries ensure (23) ___ the record is preserved and made

available for later use. People use library resources to gain information about personal interests

or to obtain recreational materials such as films and novels. Students use libraries to supplement

and enhance their classroom experiences, to learn (24) ___ in locating sources of information,

and to develop good reading and study habits. Public officials use libraries to research

legislation and public policy issues. One of the most valued of all cultural institutions, the

library (25) __ information and services that are essential to learning and progress.