用所给单词的适当形式填空
1. Traffic in the city____(interrupt) by a snowstorm at that time.
2. Scientists____ (assume) there is no animal life on Mars.
3. Conditions for scientific research were improved greatly,____ ( accelerate) the country's scientific
and technological reform.
4. Like an Apollo,he comes and____(arrest) everyone's attention.
5. You can not just____(spit) wherever you like.
