单项选择题

______ is the center of our planetary system was a difficult concept to grasp in the Middle Age.

A．It is the sun and not the earth
B．Being the sun and not the earth
C．The sun and not the earth
D．That the sun and not the earth
<上一题 目录 下一题>
热门 试题

单项选择题
Here is the money I promised, he said, I always ______ my promise.
A．agree
B．follow
C．make
D．keep
单项选择题
______ we need to complete the construction is two million dollars.
A．All what
B．That all
C．That
D．What
相关试题