Many teenagers say that they have a lot of friends they really have no best friend.A. wh

问题补充：

Many teenagers say that they have a lot of friends, they really have no best friend.

A. when

B. while

C. if

D. because

答案：

A. when

(答案→)B. while

C. if

D. because

解析：考查从句连词的选择。句意为很多年轻人说尽管他们有很多朋友，但是他们实际上没有最好的朋友。While 意为尽管 when既然，当……时候 if如果 because 因为