【推荐1】We must reached a stage ________ we must take effective measures to protect the environment from being polluted and prevent the situation _____________ we can’t deal with.

A．that, where

B．which, where

C．when, which

D．where, which

【推荐2】Our school proposes that students should involve themselves in community activities _____ they can gain experience for growth.

A．who

B．when

C．which

D．where