Tony used to _______ to school, but he is used to _______ to school now. [ ]
A. walk; taking a bus
B. walked; took a bus
C. walk; take a bus
答案:A
Tony used to _______ to school, but he is used to _______ to school now. [ ]
A. walk; taking a bus
B. walked; took a bus
C. walk; take a bus
答案:A