Effective treatments do exist, but __________ they are very expensive.
________many other scientists, Albert Einstein enjoyed music besides scientific research work.
—I need some fresh air, so I'm going out for a walk. —________.
The discovery of new evidence led to________.
—We need to buy some summer clothes, John. —Oh, I never know ________when I'm in the store.
—Isn't Miss Brown here yet? —No.________, she's not here yet.