问题补充：
—Where did you have the discussion with Professor Snow?
—It was in the classroom we had a biology lesson yesterday.
A. which
B. when
C. that
D. where
答案：
A. which
B. when
C. that
(答案→)D. where
解析：答案：D考查定语从句。句意为：——你在哪里和Snow教授谈话的？——就在我们昨天上生物课的那间教室里谈的。where引导定语从句，在从句中作地点状语，修饰先行词the classroom。故D项正确。本题易错选C项，考生误认为是强调句型。本句变成强调句型，应该是：It was in the classroom where we had a biology lesson yesterday that I had the discussion with Professor Snow.
