Đề khó lớp 8 đei =) To:Hạo

 Have you ever followed instruction for knitting (1)__________ or have you read a piece of music? If you have, you have behaved in a similar way (2)________ a computer. A computer obeys a program to carry out a particular task. Just (3)_________ a knitting pattem is expressed in numbers and a pressed in the form of programming language. (5)________ the English language ( or any other languege ), there are fules of grammar, and a program must be correct in (6)_____ way.

   There're hundreds of programming languages, (7)________ only a few are well-known and widely used. The most popular language (8)______ is used in offices and factories is called Cobol. This language is used for (9)_________ payrolls and keeping records of goods. Engineers and scientists use Fortran is order to carry out calculations. (10) _________ neither of these two programs is very popular with people working on home computers. Basic is the most popular language for home computer, chiefly (11)___________ it is easy to learn and use.

   (12)__________ these languages are useful for many purposes, it is time that a new simple program (13)__________. (14)__________ a program (15)_______ only easy to use but also completely reliable.

1. A.anything   B.everything   C.something   D.nothing

2. A.to   B.as   C.so   D.from

3. A.like   B.by   C. so   D.as

4. A.so   B.as   C.thus   D.such

5. A.So   B.Like   C.Same   D.By

6. A.every   B.most   C.almost   D.some

7. A.and   B.but   C.or   D.if

8. A.that   B.where   C.it   D.what

9. A.the printing   B.printed   C.printing   D.printer

10. A. In addition   B.Therefore   C.Consequently   D.However

11. A.if   B.so   C.because   D.although

12. A.Because   B.Although   C.When   D.For

13. A.be devised   B.were devised   C.devised   D. was devised

14. A.So   B.Such   C.Like    D.As

15. A.should be   B.shouldn't be   C. should be not   D.should not

@Cần lắm một bạn Ngọc  

Tồn tại hay không n thỏa mãn \(n^2+2^n⋮1994?\)

Tìm tất cả \(n\in N\)sao cho \(5^n+1⋮7^{2000}?\)

Chứng minh các số sau không phải số chính phương : \(5....56;5....59\)( mỗi số có 1996 chữ số 5 )

đồng tình

Who came to the party alone?

1/ What're you doing now? I'm cleaning the door.

2/ Where is Nam? He is listening to music in the living room.

3/ The Moon goes round the Earth.

4/ What is your father eating now? He is eating bread and eggs.

5/ How many hours a week does she usually work?

6/ What time does she finish work every day?

7/ How often do you go to the supermarket?

8/ Mai often buys prensents for her mother on her birhtday.

9/ The Sun rises in the Eath and sets in the West 

10/ My sister very tired. She wants to go home now. ( từ want trong thì hiện tại tiếp diễn chia như hiện tại đơn )

Hi everybody. I'm Dung. My parents often tell me about their life in the countryside. It's not much like the countryside I see now. There are a lot of changes. Now, instead of living in a earth house, people live in a house has better equipped with electric fans, televisions, air-conditioner. Schools are nearby, so they can go to school easily. People used to ride a horse or walk , but now they go by motorcycles.  More visiter are coming. They want to experience our life before.

Ô tô đột ngột thắng gấp hành khách ngã về phía trước do có quán tính.