1) What is the arrival time of your flight?
2) Most of air incidents happen during taking off and landing of the planes.
3) The new US Ambassador to China is a third Chinese-American.（你指的是骆家辉Gary Faye Locke吗?他应该是第三代）
4) I saw you in the lobby at 2:00am,and I tried to get close to you,but,I was not able to find you soon.I thought you went downstairs for breakfast.