() (1)____littering!()(2)Please______.It's very dangerous.

A


这题考查主谓一致的用法：主语被together with连接时，谓语应该和前面的主语一致，选A。

因为mean 是实义动词,其否定式是加助动词DO/DOES,主语THE SIGN是单数,故加doesn't

As public attention to the state of our environment remains front and center--and will likely stay that way for the next few decades--stopping littering should be a new priority among law makers in local communities and on up the political ladder.A survey revealed that 75 percent of Americans admitted to littering in the last five years.While laws with fines already prohibit littering,more can be done to deter people from throwing any piece of trash--this includes cigarette butts--on the ground.There are several ways to stop littering.
Firstly,While there are already fines associated with littering,the fines could be steeper,hitting offenders directly where it hurts them the most.Fines could double for people who don't take this class.
Secondly,while there are a good number of trash cans in major cities,there should be twice as many,targeted in locations where trash cans are needed,like outside restaurants and stores where people gather and collect little pieces of trash.Perhaps the nearby businesses could pay a nominal fee for their regular upkeep and emptying.
Thirdly,smoking bans help to curb littering in certain areas,as people won't smoke cigarettes there and carelessly leave their butts on the ground.Smokers also often create more garbage when it comes to the cigarette pack itself--empty cardboard or paper packs,cellophane on the packs--so keeping them and their practices out of the area will help to reduce littering in general.

no crossing
no spitting
no smoking
no talking
no dancing

even convenient

呼吸纯净环境垃圾尊重周围环境密切的 （单词错了）邻居实践保护减少废物再用回收塑料
垃圾 垃圾桶垃圾行动未来保护地球环境乱扔垃圾的人
恐怕提醒保护自然美容

1 go to the public to tell people how to deal with the rubbish.
2 give out trash bags to everyone who comes to the public so that they won't throw it everywhere.

put up papers on the wall
Carry a litter bag to a supermaket.
waste recycling

No smoking 英[nəu,ˈsməʊkɪŋ] 美[nəu,ˈsmokɪŋ]
No littering 英[nəu,ˈlitəig] 美[nəu,ˈlɪtɚig]
No parking 英[nəu,ˈpɑ:kɪŋ] 美[nəu,ˈpɑrkɪŋ]
Do not touch 英[du:,nɔt,tʌtʃ] 美[du,nɑt,tʌtʃ]
Danger 英[ˈdeindʒə] 美[ˈdendʒɚ]
No eating or drinkimg 英[nəu,ˈi:tiŋ,ɔ:,ˈdrɪŋkɪŋ] 美[nəu,ˈitɪŋ,ɔr,ˈdrɪŋkɪŋ]
Keep off the grass 英[ki:p,ɔf,ðə,ɡrɑ:s] 美[kip,ɑf,ðə,ɡrɑs]
Be quiet 英[bi:,ˈkwaiət] 美[bi,ˈkwaɪɪt]
以上仅供参考

C

Others should be stopped by us when we see them littering.
希望能够帮到楼主

答案A
这题考查主谓一致的用法：主语被together with连接时,谓语应该和前面的主语一致,选A.

litter
should是情态动词所以后面用动词原形

选C.
This sign means you shouldn't litter.
这个标志提示你不能乱丢垃圾.