He apologized to me for his_________ me to his home.
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water.
Wuhan lies _____ the Changjiang River and the Han River meets.
nation uses nuclear weapons will engage the whole world in war.
You are asked to attend the meeting ______ in the hall this weekend.
When ____ to danger and conflict, men tend to increase blood pressure, ____ nervous or anxious.