将下列句子译成英语，并将所译句子写在答题卡上标有题号的横线上。

小题1:Open the window and let some fresh air in.

小题2:The old should be talked to politely .

小题3:It’s only(It takes) twenty minutes from our school to the center of the city by taxi.

小题4:The earth is becoming more and more polluted.

小题5:We lost the game although (though) we all tried our best.