The fact that so many people still smoke in public place _______that we may need antionwide campaign to raise awareness of the riks of smoking.
Some animals pant and sweat to speed evaporation of body moisture and thus cool themselves.
In that school, English is compulsory for all students, but French and Russian are _________.
Unlike traditional gyms, app-backed gyms offer people ___________ options to exercise.
Eyespots, the most rudimentary eyes, are found in protozoan原生动物 flagellates 鞭毛虫 , flatworms 扁形虫 , and segmented worms片段 蠕虫 .
