pg 155, recap questions.
Q1. The internal threats the Chinese faced were Natural Disasters like floods and famines, Civil Wars and Rebellion.

pg 158, recap questions.
Q1. The internal threats were Natural Disasters like volcanic eruptiond, Succession Disputes, Warfare and Rebellion, and Piracy.

pg 161, recap questions.
Q1. They all faced Natural Disasters and Rebellion.

pg 174, recap questions.
Q1.The measures were forming a tribute system, building physical barriers and developing advanced weapons.

pg 177, recap questions.
Q1. The external threats that they faced were rivalry between kingdoms and foreign invasions.

pg 181, recap questions.
Q2. Ancient people built physical barriers and armies and invented weapons to protect themselves against invaders. Rulers established friendships with other rulers. Foreign invaders adopted the culture of the local people and lessons from the past.