You shouldn't spit on the ground .(变成祈使句)一定要认真回答,不要写不知道之类的话,要是真好的话,我就会选你为最佳答案,并且还有奖励呢!

You shouldn't spit on the ground .(变成祈使句)一定要认真回答,不要写不知道之类的话,要是真好的话,我就会选你为最佳答案,并且还有奖励呢!
You shouldn't spit on the ground .(变成祈使句)
一定要认真回答,不要写不知道之类的话,要是真好的话,我就会选你为最佳答案,并且还有奖励呢!

You shouldn't spit on the ground .(变成祈使句)一定要认真回答,不要写不知道之类的话,要是真好的话,我就会选你为最佳答案,并且还有奖励呢!
Don't spit on the ground.