48 và 30

nhớ bấm đúng cho mình nhé!

tìm lỗi sai để sửa:

1. do you enjoy cooking or do you just see it like a chore?

Put a ..... next to the name of the person you are voting for

Modern English is the (1) _________ of the English language (2) ______ since the great

vowel shift, completed in roughly 1550.

Despite some (3) ________ in vocabulary, text from the (4) _______ 17th century, such as

the works of William Shakespeare and the King James Bible, are considered to be in Modern

English, or more specifically, are referred to as using Early Modern English

According to Ethnology, there are (5) ________ 508 million speakers of English as the first

or (6) ________ language as of 1999, a number dwarfed only by the Chinese language (7) _________ terms of the number of the speakers. However, Chinese has a smaller geographical

range and is spoken primarily in mainland China and Taiwan and also by a sizable immigrant

community in North America. (8) _______, English is spoken in a vast number of territories

including the United Kingdom, Ireland, Canada, the United States of America, Australia, New

Zealand, India, Pakistan, and Southern Africa. Its large number of speakers, plus its worldwide

presence, have made English a (9) _______ language for use in such diverse applications as

controlling airplanes, developing software, conducting international diplomacy, and business (10) ________. 1. A. way B. form C. road D. shape

2. A. spoken B. speak C. told D. said

3. A. variety B. difference C. differences D. unlikelihood

4. A. soon B. early C. premature D. earlier

5. A. on B. beyond C. above D. over

6. A. second B. twice C. two D. secondly

7. A. on B. with C. in D. for

8. A. Contrary B. On contrary C. In contrary D. With contrary

9. A. private B. shared C. common D. public

10. A. relations B. relationship C. related D. relationa

1 va chỉ 1

a) 1 + (-2) + 3 + (-4) + .. + 19 + (-20)

= (-1) + (-1) + ... + (-1)     (có 10 số -1)

= (-1) . 10

= -10

b) 1 - 2 + 3 - 4 + ... + 99 - 100

= (-1) + (-1) + ... + (-1)   (có 50 số -1)

= (-1) . 50

= -50

c) 2 - 4 + 6 - 8 + ... + 48 - 50

= (-2) + (-2) + ... + (-2)   (có 25 số -2)

= (-2) . 25

= -50

d) -1 + 3 - 5 + 7 - ... + 97 - 99

= (-1) + (-2) + (-2) + ... (-2)   (có 49 số -2)

= (-1) + (-2) . 49

= (-1) + (-98)

= -99

e) 1 + 2 - 3 - 4 + ... + 97 + 98 - 99 - 100

= 1 + 2 - 3 - 4 + ... + 97 + 98 - 99 - 100 + 101 (ta cộng thêm 101 cho dễ tính)

= 1 + (2 - 3 - 4 + 5) + ... + (98 - 99 - 100 + 101)

= 1 + 0 + ... + 0

= 1 - 101 (ta bớt 101 để ra kết quả vì lúc nãy thêm 101)

= -100