We'll have a picnic in the park this Sunday ________ it rains or it's very cold.
One advantage of playing the guitar is _____ it can give you a great deal of pleasure.
What you said just now ______ me of that American professor.
Looking up, I saw that some children _____ rags were looking at me silently as I ate.
When asked ____ they needed most, the kids said they wanted to feel important and loved.
I have a really bad headache, and I have to ________ a doctor about my pains.