Cho các chất: HOCH₂CH₂OH, HOCH₂CH₂CH₂OH, CH₃COOH và C₆H₁₂O₆ (fructozơ). Số chất phản ứng được với Cu(OH)₂ tạo ra dung dịch màu xanh là

A. 1.

B. 2.

C. 4.

D. 3.

* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

They had their baby daughter in June and, since then, they________in restaurants very often.

A. didn’t use to eat

B. weren’t able to eat

C. couldn’t eat

D. haven’t able to eat

Phân tích đa thức sau thành nhân tử: x2 – 4 + (x – 2)2

Cacbohiđrat nào dưới đây không phản ứng với H₂ (xúc tác Ni, đun nóng)?

A. Saccarozơ.

B. Fructozơ.

C. Glucozơ.

D. Mantozơ.

* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

The latest ratings have aroused claims that reality television shows are on their last______.

A. legs

B. resort

C. breath

D. gasp

* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Administration will start by improving the executive-legislature relationship so as to set a good_______for members of the public

A. model

B. guidance

C. form

D. pattern

* Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

- Tina is still looking for a decent flat.

                   - How long__________?

A. has she been looking

B. is she looking 

C. was she looking

D. had she looked