_____ you are alone at home, why don’t you go downtown with your friends?
Day after day, they dragged their feet on and arrived at their destination ________.
My younger sister enjoys listening to music very much, with pop music _______.
Please tell me how the accident_____. I am still in the dark.
American Indians ________ about five percent of the U.S. population .
I can think of many cases ______students obviously know a lot of English words and expressions but couldn’t write a good essay .