______ the price of gas is starting to come down, many people are choosing to take the bus or the train instead.
Come and see me whenever ____.
______ 3,000 words, I also learned how to use basic grammar after being trained here.
I feel it is your husband who _______ for the spoiled child.
Not a single songat yesterday’s party.
In 1636, Harvard(哈佛大学)is one of the most famous universities in the United States.