单项选择题

_________, ozone levels in the ionosphere appear to have dropped recently.

A．However the reason
B．It is the reason
C．What is the reason
D．whatever the reason
<上一题 目录 下一题>
热门 试题

单项选择题
At first the company refused to purchase the equipment, but this decision was _________ revised.
A．subsequently
B．successively
C．predominately
D．preliminarily
单项选择题
My cousin likes eating very much, but he isn't very _________ about the food he eats.
A．special
B．peculiar
C．particular
D．specific
相关试题