The school will hold many activities to （庆祝） our country's 70th birthday．
Shall we go outside and breathe some （新鲜的） air？
Good ideas．
Liu Cixin is the （作家） who wrote the science fiction novel The three Body Problem．
﹣Dick， is this your T﹣shirt？
﹣Yes， it's （我的）． I looked for it everywhere．
This is not the first time for the two teams to play （对抗） each other．