Choose one sentence that has the same meaning as the root one:
That is the man whom they were talking about in the office today.
A. They and that man had a talk in the office today.
B. The man and they were talking in the office today.
C. In the office today they were talking with that man.
D. They were talking about that man in the office today.

Choose the best answer for the following sentence:
_________ is the process of something becoming worse or weaker, or being made worse or weaker.
 
A. Competition               
B. Representative       
C. Entertainment              
D.  Degradation

Tổng của một cấp số nhân lùi vô hạn bằng $2$, tổng của ba số hạng đầu tiên của cấp số nhân bằng$\displaystyle \frac{9}{4}$. Số hạng đầu${{u}_{1}}$ của cấp số nhân đó là
A. ${{u}_{1}}=3.$ 
B. ${{u}_{1}}=4.$ 
C. ${{u}_{1}}=\frac{9}{2}.$ 
D. ${{u}_{1}}=5.$

A. -∞.
B. +∞.
C. 0.
D. Không tồn tại.

Tìm  để các hàm số  liên tục tại  
A.  
B.  
C.  
D. 1

Hàm số f(x)=x2-16x-4 khi x≠48 khi x = 4liên tục trên
A. R.
B. R\{4}.
C. (0; +∞).
D. a, b, c đều đúng.

Kết quả của giới hạn $\displaystyle \lim \frac{{{3}^{n}}-1}{{{2}^{n}}-{{2.3}^{n}}+1}$ bằng 
A. $\displaystyle -1.$ 
B. $\displaystyle -\frac{1}{2}.$ 
C. $\frac{1}{2}.$ 
D. $\displaystyle \frac{3}{2}.$

Giá trị của giới hạn $\lim \left( \sqrt{2{{n}^{2}}-n+1}-\sqrt{2{{n}^{2}}-3n+2} \right)$ là
A. $0.$ 
B. $\frac{\sqrt{2}}{2}.$ 
C. $-\infty .$ 
D. $+\infty .$

Choose the correct sentence which is built from the words and phrases given:
police / asking / man / house / break into / last night.
A. The police is asking the man having the house broken into last night.
B. The police are asking the man whose house was broken into last night.
C. The police is asking the man into whose house was broken last night.
D. The police are asking the man whose house broken into last night.

Choose the word that has the underlined part pronounced differently from the rest:
sun             sure              success            sort
A. sun            
B.  sure              
C. success            
D. sort