为什么用the number of tigers is getting larger and langer不用biger and biger还有he is only 8 months old为什么不能用 8-month-old,简要说明,字不要太多

a number of foreigners visited our school yesterday中为什么用a number of为什么不用the number of? for the growing number of advertisements growing为什么用ing, 用“the number of”和“a number of”一起造句 the number of kinds of sharks have为什么用have是因为kinds of 最好给出解释（为什么这么选） 及a number of和the number of 的区别 ( )1.Look!( )people ( )swimming in the riverA.The number of ,are B.The number of ,is C.A number of ,are D.Anumber of ,is后面is和are呢 为什么用is或are a number of the number of the number of,a small number of,a number of. The number of the people who ____(own)cars_____(be)increasing,为什么后面用is呢? The number of the students in our class______60 为什么用is而不是has? The number of students absent from the meeting was surprising.这里为什么要用was the number of the workers here is about 50.句中为什么用is而不是are? what's the number of the smith flight leaving beijing?为什么用ing形式 the number of造句 the number of造句 the reciprocal of number the number of中文 the number of 是什么意思? the number of同义词