1. She.was reading..( read ) when the lights..went.( go ) off

2. It.began.. ( begin ) to rain when I.was cyling.. ( cycle ) home

3. When I.was talking.. ( walk ) downstairs when I..heared. ( hear ) a thunder

4. When they..left. ( leave ) work for home, the sun.was stll shining.. ( still shine )

5. James..ran. ( run ) into an old friend while he..was walking. ( walk ) home ?

6. What.were do you doing.. ( you do ) when your phone.rang..  ( ring ) ?

7. Mr. anh Mrs. Wilson.were having.. ( have ) lunch when the visitors..arrived. ( arrive )

8. When Mr. Kelvin.came.. ( come ) home, his child.was sleeping.. ( sleep )

Chọn C. Thanks, I'm just looking.

 Chọn B.

Giải thích:

"How fashionable a pair of trainers you have!"  là một câu khen ngợi về đôi giày của người đo.

Đáp lại lời khen ngợi là cảm ơn.

Bài 1.

\(M=\sqrt{2\dfrac{14}{25}}+\dfrac{0,6-\dfrac{3}{7}-\dfrac{3}{13}}{1-\dfrac{5}{7}-\dfrac{5}{13}}+\left|-\dfrac{4}{5}\right|+2023^0\)

\(M=\sqrt{\dfrac{64}{25}}+\dfrac{3\cdot\left(\dfrac{1}{5}-\dfrac{1}{7}-\dfrac{1}{13}\right)}{5\cdot\left(\dfrac{1}{5}-\dfrac{1}{7}-\dfrac{1}{13}\right)}+\dfrac{4}{5}+1\)

\(M=\dfrac{8}{5}+\dfrac{3}{5}+\dfrac{4}{5}+1=3+1=4\)

Hợp chất có công thức: \(MgO\)

PTHH: \(2Mg+O_2\underrightarrow{t^o}2MgO\)

\(n_{Mg}=\dfrac{7,2}{24}=0,3mol\) \(\Rightarrow n_{MgO}=0,3mol\)

\(m_{MgO}=0,3\cdot\left(24+16\right)=12g\)