单项选择题

A．A vacation trip to Yellowstone Park.
B．A lecture by a visiting professor.
C．Her biology thesis.
D．A research project.
<上一题 目录 下一题>
热门 试题

单项选择题
A．Relaxing at the seashore.B．Visiting her parents.C．Sailing on a boat.D．Preparing for a race.
A．Relaxing at the seashore.
B．Visiting her parents.
C．Sailing on a boat.
D．Preparing for a race.
单项选择题
Fish resources are diminishing because______.
A．no new substitutes can be found in large quantities
B．they are not owned by any particular entity
C．improper methods of fishing have mined the fishing grounds
D．water pollution is extremely serious
相关试题