问题
选择题
Scientists say human activity contributes to climate change, but they do not agree on the rate_______ climate change may be developing.
A．with which
B．with that
C．at which
D．at that
答案
答案：B
题目分析：此处with是介词，其后是介词的宾语从句，that在宾语从句中不作成分，没有意思，只起连接作用。句意：科学家们说人类活动导致气候变化，但是他们不同意气候变化的速度。