Columbus ______ America in 1492. But he didn’t explore it. A. looked for B. found out C. discovered
---Would you mind my sitting here?-- _____. Sit down, please.
Could you please ____me some suggestions for the plan?
Susan thought ____not easy to answer all these questions.
—Meat isn’t really dangerous , is it?--Oh! ____! It’s not at all good for our health.
She opened all the windows _____she could take a bit more of fresh air.