The limits of a person"s intelligence，generally speaking，are fixed at birth，but
题型：不详难度：来源：
The limits of a person"s intelligence，generally speaking，are fixed at birth，but ________ he reaches these limits will depend on his environment.(2011·安徽)
A．where
B．whether
C．that
D．why
答案
B
解析
whether引导主语从句，意为“是否”。
举一反三
(2011·重庆)It is still under discussion ________ the old bus station should be replaced with a modern hotel or not.