After four years’ research, we now have a ______ better understanding of the disease.
The vegetables didn’t taste very good.They____too long.
—— Was the driving pleasant when you went to Mexico last summer? —— No, it ____ for four days when we arrived, so the roads were very muddy.
I used to drink a lot of tea but these days I ___coffee.
—— Can you give me the right answer? —— Sorry, I____.Would you repeat that question?
Look at this ! I_____some magazines and______this letter.