We are talking about the writer _________latest book is one of the best-sellers this year

A. who

B. whom

C. which

D. whose 

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that

best fits each of the numbered blanks from 31 to 35.

Early writing and Alphabets

When people first began to write, they did not use an alphabet. Instead, they drew small pictures to (31) _______ the objects they were writing about. This was very slow because there was a different picture for every word.

            The Ancient Egyptians had a (32) _______of picture writing that was called hieroglyphics. The meaning of this writing was forgotten for a very long time but in 1799 some scientists (33) _______ a stone near Alexandria, in Egypt. The stone had been there for over a thousand years. It had both Greek and hieroglyphics on it and researchers were finally able to understand what the hieroglyphics meant.

          An alphabet is quite different from picture writing. It (34) _______of letters or symbols that represent a sound and each sound is just part of one word. The Phoenicians, who lived about
3,000 years ago, developed the modern alphabets. It was later improved by the Roman's and this alphabet is now used (35) _______ throughout the world.

Điền vào ô 33.

A. discovered

B. realized

C. delivered 

D. invented

My colleagues have promised to _________ when I tell the manager about my ideas.

A. cut me off

B. cut off me

C. back me up

D. back up me 

Tìm điều kiện của n sao cho  ( n + 2012 2013 ) ( n + 2013 2012 ) ⋮ 2

Read the following passage and mark the letter A, B, C or D to indicate the correct word or phrase that

best fits each of the numbered blanks from 31 to 35.

Early writing and Alphabets

When people first began to write, they did not use an alphabet. Instead, they drew small pictures to (31) _______ the objects they were writing about. This was very slow because there was a different picture for every word.

            The Ancient Egyptians had a (32) _______of picture writing that was called hieroglyphics. The meaning of this writing was forgotten for a very long time but in 1799 some scientists (33) _______ a stone near Alexandria, in Egypt. The stone had been there for over a thousand years. It had both Greek and hieroglyphics on it and researchers were finally able to understand what the hieroglyphics meant.

          An alphabet is quite different from picture writing. It (34) _______of letters or symbols that represent a sound and each sound is just part of one word. The Phoenicians, who lived about
3,000 years ago, developed the modern alphabets. It was later improved by the Roman's and this alphabet is now used (35) _______ throughout the world.

Điền vào ô 31.

A. notice

B. show

C. appear

D. mark

The president _________ tribute to all the people who had supported him.

A. made

B. paid

C. gave

D. turned down 

Có bao nhiêu điểm biến thành chính nó qua phép quay tâm quay  α ≠ k 2 π

A.0

B.1

C.2

D. vô số