---Do you know where Mary is? ---No, I don’t. I ____ her since last Sunday night.
Those ______ have six or more close friends are described as “very happy”.
Health experts believe that even a little exercise is far better than ______ at all.
______ that I was in trouble, Tom came to my aid without delay.
We climbed higher ______ we might see the scenes better.
John seemed puzzled about ______ the question meant.