С) fill in the gaps with the, a or - (no article) 1) __usa is bigger tham __england. 2) which is __ largest country in __ world? 3) is __ caspian sea or __ dead sea __ saltiest in __ world?

1) THE USA is bigger than England.
2) Which is THE largest country in THE world?
3) Is THE Caspian Sea or THE Dead Sea THE saltiest in THE world?