the foreign friends here is over 400. And them e from the USA.
A．The number of; the number of
B. A number of ; a number
C. The number of ; a number of
D. A number of ; the number of
网友回答
解析：The number of……的数目；a number of一些，许多。句意：这儿的外国朋友数目超过400人，他们中一些人来自美国。故选C。