_______ he has made a decision, it is not easy for you to make him change his mind

The government claims to exercise control over housing prices. But the fact is_______ ideal.—- It’s _______ wonder that there are constant complaints on the Internet.

My uncle works as a(n) _____ in Beijing. His main job is to help visitors from other countries.

Many students go to school _______ the tube in Beijing every day.

Mary needs ________help. Let’s go and help_________.