单项选择题

The natural forms of energy are the sun, the wind, the sea ______ heat from the center of the earth.

A．as well as
B．as well
C．so well as
D．so well
<上一题 目录 下一题>
热门 试题

单项选择题
You can't come in, ______ you are.
A．whichever
B．whoever
C．wherever
D．whenever
单项选择题
Neither Mary nor I ______ to Shanghai before.
A．has gone
B．have gone
C．has been
D．have been
相关试题