6.The freezing point is the temperature _______ water changes into ice.A.at which B.on that

问题描述:

6.The freezing point is the temperature _______ water changes into ice.A.at which B.on that

the temperature是先行词,在水中用介词at,在哪一个被冻成冰的水中,A at which

A
定语从句中引导词能放介词后的只有which和whom.that不能这样用的.