there are a number of factors to consider 还是to befactors to consider / factors to be considered 好像两种用法都有,为什么?

there are a l什么number of books there there is a large number of children还是there are a large number of children正确 There is a large number of还是there are a large number of 那个句子更妥帖 there are a grwowing number or there is a growing number There is/are a number of discussion如题 是There is 还是There are 为什么 There ----a number of people there.There number of people there---over twenty.A.are,are B.is,are C.is,is D.are ,is There are a number of more and more people.为什么? there are a great number of sleep in Australia. there are( )numbers in a mobile phone number in china? There are a number of reasons behind my belief是什么意思 There are () stamp-collectors in our class A the number of B a number OF c NUMBERS D NUMBER OF there are a large number of.为什么用ARE后面不是A吗 There are a number of students are from the countryside.这个句子对么 There are a considerable number of..为什么这里用are不是is? A number of boys are playing football over there.(改同义句)（)()()boys are playing football over there. A number of boys are playing football over there .同义句（）（）（）boys are playing football over there . There are a number of books in our library,the number of books is about 5,000(英译中） ---How many students are there in your school?------------the students in our school --------over two thousand.A.The number of; is B.The number of; are C.A number of; is D.A number of; are