The limits of a person’s intelligence,generally speaking, are fi

The limits of a person’s intelligence,generally speaking, are fixed at birth, but _____ he reaches these limits will depend on his environment.
A、where
B、whether
C、that
D、why
【正确答案】：B
【题目解析】：首先把插入语generally speaking删掉，选择B.本题考查名词性从句，but whether he reaches these limits 【作为句子主语】will depend on his environment.【考点】考查名词性从句。