Tích phân  $\displaystyle I=\int\limits_{1}^{2}{\frac{\ln x}{{{x}^{2}}}dx}$ bằng
A. $\displaystyle \frac{1}{2}\left( 1+\ln 2 \right)$.
B. $\displaystyle \frac{1}{2}\left( 1-\ln 2 \right)$.
C. $\displaystyle \frac{1}{2}\left( \ln 2-1 \right)$.
D. $\displaystyle \frac{1}{4}\left( 1+\ln 2 \right)$.

Choose the best answer for the following sentence:
Ann's mother __________ when she came home late.
A. worry               
B. worrying                   
C. worried               
D. to be worried

Tích phân $I=\int\limits_{0}^{\pi }{(x+2)cos2xdx}$ bằng
A. $0.$
B. $-\frac{1}{4}.$
C. $\frac{1}{2}.$
D. $\frac{1}{4}.$

Tích phân $I=\int\limits_{0}^{\frac{1}{\sqrt{3}}}{\frac{{{x}^{8}}}{{{({{x}^{4}}-1)}^{2}}}dx}$ bằng
A. $\frac{1}{\sqrt{3}}+\frac{1}{4}\ln \frac{\sqrt{3}-1}{\sqrt{3}+1}+\frac{\pi }{12}-1.$ 
B. $\frac{1}{\sqrt{3}}+\frac{1}{4}\ln \frac{\sqrt{3}-1}{\sqrt{3}+1}+\frac{\pi }{12}.$ 
C. $\frac{1}{\sqrt{3}}+\frac{1}{4}\ln \frac{\sqrt{3}-1}{\sqrt{3}+1}+\frac{\pi }{12}-12.$ 
D. $\frac{1}{\sqrt{3}}+\frac{1}{4}\ln \frac{\sqrt{3}-1}{\sqrt{3}+1}+\frac{\pi }{12}-2.$

Tích phân $I=\int\limits_{0}^{\frac{\pi }{4}}{\frac{\cos x}{{{(\sin x+\cos x)}^{3}}}dx}$ có giá trị bằng
A. $\frac{3}{8}.$
B. $-\frac{3}{8}.$
C. $\frac{8}{3}.$
D. $-\frac{8}{3}.$

Cho tích phân $I=\int\limits_{0}^{\frac{\pi }{4}}{(1+\frac{1}{{{\cos }^{2}}x})dx}=a.\pi +b.$ Khi đó tổng a+2b bằng
A. $\frac{9}{2}.$
B. $9.$
C. $\frac{9}{4}.$
D. $\frac{9}{8}.$

Choose one sentence that has the same meaning to the root one:
By the time we arrived, all the students in my class had left.
A. All the students in my class had left before we arrived.
B. All the students in my class were leaving when we arrived.
C. All the students in my class was leaving when we were arriving.
D. After we arrived, all the students in my class had left.

Choose the word that has the underlined part pronounced differently from the rest:
admission           television               tension             commission
A. admission           
B. television              
C. tension             
D. commission

Choose the best answer for the following sentence:
She has a very big house in __________ Salt Lake City is __________ capital of Utah. 
A. the / a                 
B. Ø / the                  
C. the / Ø               
D. Ø / a

Choose the best answer for the following sentence:
It’s kind of you _____________ me with my homework.
A.  help 
B. to help
C. helping 
D. to helping