--- What’s the use of this kind of fuel(燃料) ?--- It can make the train __________ fast.
—Did Sam go to the cinema yesterday? —Yes, we all went there ____ him.
He is sitting _______ the room that is _________ the old tree.
The doctor told me to take this medicine ____.
The little girl made money ___ selling flowers.
Our Chinese like eating moon cake ____ Mid-autumn Day.