Truyện "Tản Viên từ Phán sự lục mở đầu trực tiếp bởi vì đoạn mở bài giới thiệu vào thẳng vấn đề rằng là Ngô Tử Văn tên là Soạn..... 
 

Ưu điểm của mở bài trực tiếp
- ngắn gọn 
- mọi học sinh đều có thể viết

- dễ tiếp nhận
Nhược điểm:
- không tạo điểm nhấn, hứng thú cho người đọc

\(Hoa\) \(sen\) : \(louts\) \(flower\)

\(Hoa\) \(hồng\) : \(rose\)

\(Hoa\) \(cẩm\) \(tú\) : \(hydrangea\) \(flower\)

4. The last time I met her was when she had short hair.

⇒I haven't met her since she had short hair .

5.Because I was sick, I couldn't go out

⇒Because of the fact that I was sick , I couldn't go out .

                      being sick , I couldn't go out .

                      my sickness , I couldn't go out .

\(\dfrac{2}{3}.20\%.\dfrac{10}{7}=\dfrac{2}{3}.\dfrac{20}{100}.\dfrac{10}{7}=\dfrac{2}{3}.\dfrac{1}{5}.\dfrac{10}{7}=\dfrac{4}{21}\)

\(x^2+4x-5=0\)  ( a = 1 ; b^, = 2 ; c = - 5 ) 

\(\Delta^,=\left(b^,\right)^2-a.c\)

      \(=2^2-1.\left(-5\right)\)

      \(=9>0\)

pt có 2 n_o phân biệt :

\(x_1=\dfrac{-b^,+\sqrt{\Delta}}{a}=1\)

\(x_2=\dfrac{-b^,-\sqrt{\Delta}}{a}=-5\)

Vậy pt có n_o : x = 1

                      x = - 5

how much is this book

26.  When I was a child. We lived in Bristol. (used)

⇒ We used to live in Bristol when I was child .

27. I have never read such a romantic story. (most)

⇒ This is the most romantic story I haver ever read .

28. I last talked to him five months ago. (haven’t)

⇒ I haven't talked to him for five months .

29. He doesn’t know how to prepare for a presentation. He doesn’t feel confident. (If)

⇒ If he knew how to prepare for a presenration , he would fell confident .

30. My father’s explanation about the subject was clearer than my brother’s. (clearly)

⇒  My father explained the subject more clearly than my brother's .