问题
选择题
When I was at school, I _____ up very late, reading storybooks.
A．used to stay
B．was used to stay
C．used to staying
D．am used to staying
答案
答案：A
考查短语搭配。used to do sth.过去常常做某事。句意：当我上学的时候，我常常看小说而睡得很迟。
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