I forgot to include the following statements. Thank you for your invaluable help.
1) He concludes that the real source of love lies in the eyes.The duke asks Shylock to have mercy/pity on Antonio (also: to be merciful to/pitiful to Antonio?)
1)If only he makes him bleed, he will lose all his property. (also: all of his property?)
To pay back a debt, to repay a debt, to pay off a debt (are they all possible?)
2) They become rich because half of Shylock’s fortune will go to them.
3)He agrees to the loan on condition that the money will be paid back (or is paid back?) in three months'time.
4) He will have a pound of flesh from Antonio (also: a pound of Antonio's flesh).
1.. not pitiful for but perhaps have pity on...(the eyes are the "windows of the soul!)
Everything else possible.
Sra