Guess the word by the explanation of its meaning.
1the ability to do things
2each of several substances which are present in some products and which you needto stay healthy
3several streps that take you from jne floor to another in a building
4expecting things to turn out well
5a board or stone under the doorway of a building
6tho organs in our body that remove waste products from the blood
7the measure of how heavy you are
8something that you do without thinking because you have done it so often
9something you give
10to say that something is good or suitable
1 power
2 vitamin
3 stairs
4 hope, optimism
5 doorstep
6 kidneys
7 weight
8 habit
9 gift
10 to approve