Answer:
2. might have forgotten to take it with him.
3. he couldn't have run (im not sure about this one sorry D:)
4. must have left them at Donna's house.
5. you should have told me / I would have given you...
Gravity is what holds us down to keep our balance
The height of an item or point in relation to sea or ground level
Answer:
The speaker is suggesting that love is necessary even if people fight sometimes.
The speaker is suggesting that there was a big fight between lovers just now.
The speaker is suggesting that love is confusing and encompasses everything all at once.
The speaker is suggesting that no one should ever fall in love.