问题
选择题
Recent studies have shown that most US graduates receive cash as gifts, though the amount received ______ from person to person．
A．prefers
B．promotes
C．varies
D．suffers
答案
答案：C
词义辨析。 A．更喜欢 B．促进 C．改变；违背 D．遭受。句意：最近的研究表明，大多数美国毕业生收到现金作为礼物，尽管数量人与人之间有所不同。故选C。