1.The number of road a (事故) has increased over the past year.
答案accidents
2.Doctors performed an emergency o (手术) on the injured worker last night.
答案operation
3.The airport and seaport are important to (进口) and export portable goods.
答案import
4.He is a friendly person and usually a his colleagues with lots of things.
答案assists
5.When we visited my old family home, (记忆) came flooding back.
答案memory
6.It was not until m (午夜) that they reached the foot of the hill.
答案midnight
