Choose the best answer for the following sentence:
The _____________ of pop music is because of its strong beat and simple tunes which is easy to remember. 
A. popular                        
B. popularly                      
C. popularize                    
D. popularity

Find a mistake in the four underlined parts of the sentence and correct it:
There would be a lecture by Mr. Brown next week.
A. would be
B. lecture
C. by
D. next week

Choose the best answer for the following sentence:
Kim said that ____________.
A. she wasn’t good at English last semester.
B. she hadn’t been good at English the last semester.
C. she wasn’t good at English the semester before.
D. she hadn’t good at English the previous semester.

Choose one sentence that has the same meaning as the root one:
Your refusal to attend the party made everyone feel sad.
A. You made everyone sad about your refusal to leave the party.
B. Everyone felt sad when you refused to attend the party.
C. Your attendance at the party made everyone feel sad.
D. Everyone felt sad when attending the party.

Choose a word that has different stress pattern:
condition                habitat                       accident                 paragraph
A. condition                
B. habitat                       
C. accident                
D.  paragraph

Với giá trị nào của m thì phương trình ${{x}^{2}}-mx+4=0$ có nghiệm kép:
A. m = 4
B. m = – 4
C. m = 4 hoặc m = – 4
D. m = 8

Phương trình ${{x}^{2}}-3x+2=0$ có hai nghiệm là:
A. $x=-1;x=2$ 
B. $x=1;x=-2$ 
C. $x=1;x=2$ 
D. $x=-1;x=-2$

Phương trình ${{x}^{4}}-{{x}^{2}}-2=0$ có tập nghiệm là:
A. $\left\{ -1;2 \right\}$  
B. $\left\{ 2 \right\}$
C.  $\left\{ \sqrt{2};-\sqrt{2} \right\}$
D.  $\left\{ -1;1;\sqrt{2};-\sqrt{2} \right\}$

Với giá trị nào của m thì phương trình sau có nghiệm kép ${{x}^{2}}+mx+9=0$ ?
A. $m=\pm 3$
B. $m=\pm 6$  
C. $m=6$
D. $m=-6$

Với giá trị nào của m thì phương trình ${{x}^{2}}-2x+3m-1=0$ có nghiệm ${{x}_{1}};{{x}_{2}}$thoả mãn ${{x}_{1}}^{2}+{{x}_{2}}^{2}=10$
A. $m=-\frac{4}{3}$
B. $m=\frac{4}{3}$
C. $m=-\frac{2}{3}$ 
D. $m=\frac{2}{3}$