I think it is necessary for us _________ exercise every day.
A:take
B:to take
C:taking
D:taken
He has two sisters. One is a doctor and is a teacher.
给下列加线字注音:
长眠____ 骸_____骨 猛犸____ 乌____有
潜____行 引颈____ 葱茏____ 档____案
要求:(1)有心理描写;(2)至少运用两种修辞方法;(3)有意境;(4)不少于120字。