问题
选择题
Jessica ought to stop work.She has a headache because she _______ too long.
A．read
B．is reading
C．had read
D．has been reading
答案
D
本题考查时态。从语境看，说明读了很长时间，所以应用现在完成进行时，强调动作对现在造成的结果。
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