The boy has made rapid progress, and he has already ______ in ______ the exam.
A：success; pass
B：successful; to pass
C：succeed; passed
D：succeeded; passing
下列地理现象与太阳活动密切相关的是（ ）
宪法具有最高法律效力的原因是（ ）
小华家的菜地里，蔬菜生长迟缓，需施用氮肥，小华应选择的肥料是( )
