1.It is__________ not to spit in public places.

1.It is__________ not to spit in public places.
A.a good manner B.good manner C.good manners D.the good manner
2.A good sailor must be able to sail in_________.
A.all the weather B.all the weathers C.all weather D.all weathers
3.”___________makes perfect.” Is _________in learning any subject or skill in your life.
A.Practice,a good advice B.Practices,a good advice
C.Practices,good advice D.Practice,good advice.
4.Walking along the __________,I saw the children building castles with______________.
A.sands,sand B.sands,sands C.sand,sands D.sand,sand

1.主语从句.good manner不可数,所以不用不定冠词
2.weather不可数,在这里是泛指所有天气,要加冠词the
3.Practice不可数,advice可数
4.the sand沙滩,sands沙