1. B

2. C

3. C

4. A

5. C

1. B

2. C

3. C

4. A

5. C

1, C -> education

2, recruits => recruiters

3, Wooden => woods 

4, c => high

5, b -> spetacular

6, D -> write

Bài 1:

\(R=U:I=15:0,1=150\Omega\)

\(\Rightarrow R_b=R-R'=150-50=100\Omega\)

\(I=I'=I_b=0,1A\left(R'ntR_b\right)\)

\(\left\{{}\begin{matrix}U'=R'.I'=50.0,1=5V\\U_b=R_b.I_b=100.0,1=10V\end{matrix}\right.\)

\(I_{sau}=I+0,15=0,1+0,15=0,25A\)

\(\Rightarrow R_{bsau}=U_b:I_{sau}=10:0,25=40\Omega\)

Bài 2:

\(R=U:I=25:1=25\Omega\)

\(\Rightarrow\dfrac{1}{R_b}=\dfrac{1}{R}-\dfrac{1}{R'}=\dfrac{1}{25}-\dfrac{1}{50}=\dfrac{1}{50}\Rightarrow R_b=50\Omega\)

\(U=U'=U_b=25V\)(R'//R_b)

\(\left\{{}\begin{matrix}I'=U':R'=25:50=0,5A\\I_b=U_b:R_b=25:50=0,5A\end{matrix}\right.\)

B - A - A

1.B

2.A

3.A

b

a

a

1 gets => get

2 teach => teaches

3 doesn't => don't

4 am => is

5 what do => what does

6 doesn't => don't 

7 speak => speaks

8 goes => go

9 aren't => don't

10 is => are

6. In spite of -> Instead of

7. am meeting => meet

8. which -> where 

9. cuts -> cut

10. am needing -> need