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42. The first virus appeared _________.
A.In 1986 B. In 1987 C. In 1990 D. On Friday 13th
43. Computer viruses became extremely dangerous _________.
A.on Friday 13th
B. when the first virus called Brain was created
C. when computers were connected to e-mail and Internet systems
D. in 1987
44. Which statement is TRUE about computer viruses?
A.The Melissa virus is part of the Internet system.
B. The virus Jerusalem is harmless because it did nothing.
C. A computer virus can kill people.
D. computer virus is a program.
45. A “remedy" (paragraph 4) refers to __________.
A.viruses B. programmers C. medicine D. antivirus software
46. The word "which" in the last paragraph refers to __________.
A.a computer virus created by people B. a computer virus
C. a few hours' stoppage caused by people D. the stoppage of the whole world caused by a computer virus
Chọn câu trả lời đúng:
A computer is an electronic..(1).. which executes software programs. It consits..(2)..2 parts hardware and..(3)..The computer processes input through input devices like mouse and keyboard. The computer displays output through output devices like color monitor and printer. The size of a computer varies considerably from very..(4)..to very big. The speed of computers also has a very large range. Computers have become indispenable in today's world. ..(5)..of people use computers all over the world
1. A. device B. computer C. monitor D.form
2. A. for B. with C. of D.about
3. A. mouse B. keyboard C. screen D. software
4. A. slim B. small C. large D. heavy
5. A. millions B. thousands C. hundreds D. none
Read the passage and choose the best answers :
TECHNOLOGY AND YOU
Computers ( 1) ........................ part of our daily lives . We visit shops , offices , and places of ( 2) ................. beauty with the help of computers . We pay bills prepared by computers . We read newspapers and magazines ( 3) ................... have been produced on computers . We receive letters from and send letters to almost every part of the world with the help of computers . And we can even learn foreign languages on computers .
What makes a computer such a miraculous device ? Each time you turn it on , with appropriate hardware and software , it is capable ( 4 ) ............................. almost anything you ask it to . It is a calculating machine which speeds ( 5 ) ............... calculations : it can add , subtract , multiply , and divide with lightning speed and perfect accuracy .
1. A . has become B. have become C . has became D . have becoming
2. A . scenic B . scene C . science D . since
3. A . what B . which C . who D . whom
4. A . to do B . of doing C . doing D . for doing
5. A . of B . to C . from D . up