Now an increasing number of middle school students go abroad for further study at their own ________, trying hard to realize their dreams.
--I’m going to the States? --How long ________ you________ in the States?
Rather than _________ on a crowded bus, he always prefers _________ a bicycle.
__________ of the students who took part in the military training is 450.
He realized she was crying ________ his words.
Mary, ________ here. Everybody else, stay where you are.