We were two hours late that day, which was due to the _________.

A．crowded traffic

B．crowded traffics

C．busy traffic

D．busy traffics

I have been told that the new law will come into ______ on January 1st next year.

— Why does he never pick up the waste paper on the ground?
— Maybe because he thinks it’s beneath his         to do so．

His letter was so confusing that I could hardly make any ______ of it.

Now that he has missed his      ，he’ll have to wait for the next round．

It can’t be a（n） _______ that four jewelry stores were robbed in one night．

The talk between the two leaders was aimed at ending the long        of war between the two countries．

As a doctor , it’s against my ______ to accept gifts from patients.

A study shows that walking fast in your old age is a ______ that you will live a long life.

The Louvre in Paris is one of the most famous museums, housing many priceless _______.