Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
Swimming in the sea in summer is _____.
A.the best
B.better
C.best
D.the better

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
You should take _____ clothes with you because it’ll be cold in Sa Pa.
A.hot
B.warm
C.slight
D.light

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A _____ is a building used for the worship of a god or gods in some religions.
A.college
B.university
C.temple
D.park

 Hàm số $y=\sin x$ có đạo hàm là:
A.$y'=-\cos x$
B.$y'=\dfrac{1}{\cos x}$     
C.$y'=\cos x$   
D.$y'=-\sin x$

Đạo hàm của hàm số $y=\sin \left( 2x+1 \right)-\tan \left( 1-x \right)$
A.$\cos (2x+1)+\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$
B.$2\cos (2x+1)-\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$
C.$2\cos (2x+1)-\dfrac{2}{{{\cos }^{2}}\left( 1-x \right)}$
D.$2\cos (2x+1)+\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$

 Đạo hàm của hàm số $f\left( x \right)=2\sin 2x+\cos 2x$ là
A.$4\cos 2x+2\sin 2x$.     
B.$4\cos 2x-2\sin 2x$.                 
C.$2\cos 2x-2\sin 2x$.
D.$-4\cos 2x-2\sin 2x$.

Để tính đạo hàm của hàm số $y=\sin x.\cos x$, một học sinh tính theo hai cách sau:
(I) ${y}'={{\cos }^{2}}x-{{\sin }^{2}}x=\cos 2x$
(II) $y=\dfrac{1}{2}\sin 2x\Rightarrow y'=\cos 2x$
Cách nào ĐÚNG?
A.Chỉ (II).       
B.Cả hai cách.
C.Không cách nào. 
D.Chỉ (I)

Hàm số $y=\cot x$ có đạo hàm là:
A.$y'=1+{{\cot }^{2}}x$
B.$y'=-\dfrac{1}{{{\cos }^{2}}x}$    
C.$y'=-\dfrac{1}{{{\sin }^{2}}x}$   
D.$y'=-\tan x$ 

Đạo hàm của hàm số $y=\sin \left( 2x+1 \right)-\tan \left( 1-x \right)$
A.$2\cos (2x+1)-\dfrac{2}{{{\cos }^{2}}\left( 1-x \right)}$
B.$2\cos (2x+1)-\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$
C.$2\cos (2x+1)+\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$
D.$\cos (2x+1)+\dfrac{1}{{{\cos }^{2}}\left( 1-x \right)}$

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to the following question.
A large grave, especially one built of stone above or below the ground is called a ……………….
A.temple
B.church
C.tomb
D.pagoda