基本信息
三、单项填空（15小题，计15分）
从A、B、C、D四个选项中，选出可以填入空白处的最佳答案。
16. Jenny became a football player in River Lake High School ______ the beginning of this year.
A. onB. forC. withD. at
17. When their lost son _______, the couple were in tears with joy.
A. got up B. turned up C. looked up D. gave up
