問題詳情
23. Researchers found that the number of best friends boys and girls have _____different. It is common for girls of school age to have one best friend, but boysusually have several good friends.
(A) is
(B) has been
(C) are
(D) have been
參考答案
答案：A
難度：困難0.375
統計：A(3),B(2),C(2),D(1),E(0)