问题
选择题
It is typical of students to stay up ________ deep into the night for the final exam.
A．to read
B．having read
C．to have read
D．reading
答案
答案：D
题目分析：句意：学生为了期末考试熬夜读书到深夜是常有的事情。这里read和stay up是同时发生的事情，用现在分词做伴随状语，选D。