单项选择题

If roundworms are removed from the soil and placed in a liquid, they thrash helplessly around.

A．carelessly
B．tirelessly
C．powerlessly
D．heartlessly
<上一题 目录 下一题>
热门 试题

单项选择题
Medieval cities grew rapidly when they had harbors nearby.
A．merchants
B．castles
C．suburb’s
D．ports
单项选择题
Due to the tilt of Neptune’s axis, the Sun heats the planet’s northern and southern hemispheres unequally.
A．climates
B．halves
C．atmospheres
D．contours
相关试题