Giao tuyến giữa hai mặt cầu $\left( S \right)$ và $\left( S' \right)$ (nếu có) là
A.đoạn thẳng.
B.đường thẳng.
C.đường tròn.
D.hình tròn.

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Most young people ________________ the mass media as their main source of information.
A.rely on
B.try on
C.put on
D.hold on

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I like the ____________________ on Facebook and Twitter because I can send free messages online and they are immediately displayed on my friends’ screen.
A.distant messaging
B.instant messaging
C.constant messaging
D.offline messaging

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Has your sister ever thought of a career in ______________?
 
A.journal
B.journalistic
C.journalist
D.journalism

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
How many means of ______________ do you use every day?
A.communicator
B.communication
C.communicative
D.communicating

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Video and computer games have become a ___________ media form.
A.global
B.big
C.mess
D.mass

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
I joined an ____________ online course to study Spanish.
A.interaction
B.active
C.interactive
D.action

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Our lives were transformed with the ________________of the mass media and especially the Internet.
A.advert
B.advice
C.advent
D.appear

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
My boss has created a group chat so that we can post ______________ on our projects and discuss with each other online.
A.updates
B.updated
C.up-to-date
D.updating

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
The mass media are _______ of communication such as books, newspaper, radio, televisions and the Internet.
A.models
B.types
C.parts
D.means