单项选择题

The energy gained from the sun can then be used during the hight to enable the necessary chemi-cal reactions to _______ in his body.

A．conduct
B．proceed
C．progress
D．practice
<上一题 目录 下一题>
热门 试题

单项选择题
Wild ducks always fly in a definite _______.
A．figure
B．formula
C．shape
D．formation
单项选择题
The idea of traveling through _______ space to other planets interests many people today.
A．a.
B．the
C．\
D．one
相关试题