Noise is unpleasant, ________ when you are trying to sleep

－Can I join Oxfam Trailwalker－Only if you are ________ eighteen.

Put on more clothes, Kate. The window in our room ______ yesterday.

Mr. Wang used to dinner in the restaurant, but now he is used toevery meal with his family at home.

You know that you were driving at 100 kilometers per hour, don’t you?—No, officer, I _____ have been. This car can’t do more than 80.