问题
选择题
It was their old car my friend and his father sold to a Mexican last week.
A．when
B．which
C．whether
D．that
答案
：D
：考查强调句型。强调句型的基本结构为：it is/was被强调部分that/who其它成分；最大特点是把it is/was…that/who…去掉句子仍然成立。本题强调的是their old car,作为动词sold的宾语。故D正确。