_ difficult and challenging the task may be, wemust finish it on time, because there is a possibility _______our work will godown in history

My name’s Tom Hanks. Tom is my ___name and Hanks is my ___name.

We had a big meal in a fine restaurant last Monday and the total cost_______ five hundred dollars．

Only when the war was over ________ returnto their hometowns.

Only when I left my parents for Italy ________ how much I loved them.