Write a letter to your friend to your friend in another country telling him/her what you will be doing after senior secondary school level

you should write it your self. Like Telling him/ her about your aim what things will you are thinking to accomplish in your life. It's simple you just have to think what will you do after senior secondary School level.what are thinking to accomplish in your future.

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.

the answer is c.the valence of the atoms combine .