句子写作：TodayatschoolMrMoorebroughtinhispetrabbit.Heshowedittotheclass.

How many forms can articles be roughly divided into?what are they?

句子写作：Iwasveryembarrassed.Ididn’tknowwhatIshoulddo.

流行性乙型脑炎的传染源是

句子写作：He is very busy preparing IELTS. He has no time to play.