问题：
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
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 |
参考答案：