It is almost five years_______ we saw each other last time.
The gas tank____________ twenty gallons of gas, but now it may____________ only three gallons.
--The two pairs of shoes are __________ the same colour.--But they are different __________ colour.
--Whose advice do you think I should take?--___________.
--Did you enjoy yourself yesterday?--Yes. As you saw , ________ party went on in____________ most pleasant atmosphere.
If human beings had been a bit less greedy and cruel, more birds and animals dying out.