Although this sound like a simple process, great care is needed.
Ladies and gentlemen, please fasten your seat belts.The plane ________.
.He is always ready to help others, seldom, ______, refusing them when they turn to him.
---Excuse me.Can you spare me a few minutes? ---______.
Living in such a high mountain _________be cold.
-Is there any possibility ______ you could pick me up at the airport?-No problem.