a number of sheep ____ very happy.is 还是 are

a number of sheep ____ very happy.is 还是 are a small number of students后面用is 还是are? There is a large number of还是there are a large number of one percent of 10 sheep 后面用is 还是are? Reading can bring us a lot of ____ .(happy) Peter is very __ There is/are a number of discussion there is\are a number of people... there ____ a kind of books.是is 还是are? The number of sheep are getting langer and larger 改错 there is a large number of children还是there are a large numbe She ____(have) a new kite.She is very happy. there__ a number of deer playing with people.空里填is还是are?