Choose the best answer for the following sentence:
We ___________ dinner at home on Saturdays.
A. haven’t had 
B. didn’t had
C. aren’t have 
D. don’t have

Choose the best answer for the following sentence:
There’s a serious accidents on my way here. Many people were injured but only some __________ to hospital.
A. were taken
B. were taking 
C. have been taken
D. have been taking

Find a mistake in the four underlined parts of the sentence and correct it:
If I don't like you, I wouldn't invite you to my house.
A. don't like
B. invite
C. to
D. house

Choose the best answer for the following sentence:
How long did ___________ Nguyen Dynasty last? 
A. a                  
B. an                         
C. the      
D. Ø

Choose one sentence that has the same meaning as the root one:
I am really sorry that I forgot your birthday.
A. I forgot not to give you a birthday present.
B. I do apologise for my forgetting your birthday.
C. I remembered your birthday, but I forgot to give you a present.
D. I didn't remember your birthday and I didn't give you a present.

Choose the best answer for the following sentence:
They informed that the flood __________ the children from ___________ to school.
 
A. prevent / go                 
B. prevented / went 
C. prevented /going                
D. prevent / going

Diện tích hình phẳng giới hạn bởi đồ thị hàm số $\displaystyle y=f(x)$ liên tục trên đoạn $\displaystyle \left[ a;b \right]$, trục hoành, hai đường thẳng $\displaystyle x=a,x=b$ có công thức là: 
A. $\displaystyle S=\int\limits_{a}^{b}{\left| f(x) \right|}\,dx$
B. $\displaystyle S=\int\limits_{a}^{b}{f(x)}\,dx$
C. $\displaystyle S=\int\limits_{a}^{b}{{{[f(x)]}^{2}}}\,dx$
D. $\displaystyle S=\int\limits_{b}^{a}{\left| f(x) \right|}\,dx$

Cho tích phân  $\displaystyle I=\int\limits_{0}^{1}{\frac{x}{\sqrt{x+3}}}dx$ và$\displaystyle J=\int\limits_{0}^{\frac{\pi }{2}}{\frac{\cos x}{3\sin x+12}}dx$, phát biểu đúng là 
A. $\displaystyle I>J$.
B. $\displaystyle I=2$.
C. $\displaystyle J=\frac{1}{3}\ln 5$.
D. $\displaystyle I=2J$.

Tích phân $I=\int\limits_{0}^{{\frac{\pi }{4}}}{{\frac{{dx}}{{{{{\cos }}^{6}}x}}}}$ bằng?
A. $\frac{7}{{15}}.$
B. $\frac{{28}}{5}.$
C. $\frac{{28}}{{15}}.$
D. $\frac{7}{5}.$

Tích phân $I=\int\limits_{{\frac{\pi }{6}}}^{{\frac{\pi }{2}}}{{\sin x.\sqrt{{{{{\sin }}^{2}}x+\frac{1}{2}}}dx}}$ bằng?
A. $\frac{3}{{16}}(\pi +2).$
B. $\frac{3}{8}(\pi +2).$
C. $\frac{3}{4}(\pi +2).$
D. $\frac{3}{2}(\pi +2).$