问题
选择题
(2013·辽宁六校高三联考)Have you ever seen any trees ________ leaves were black because of the polluted air?
A．whose
B．that
C．which
D．who
答案
答案：A
A 考查定语从句。句意：你见过由于空气污染而叶子变黑的树吗？空处引导定语从句修饰先行词trees，并在从句中作leaves的定语，故用whose。