The government ______ air quality in urban areas from levels one to five: excellent, fairly good, slightly polluted, poor and dangerous.
A．distributes B．arranges C．classifies D．divides
The millionaire passed away, leaving his children with a large ______.
A．fortune B．luck C．sum D．amount
The Thinker, head in hand, resting his right arm on his left knee, gained its current title when ______ in Paris in 1890.
A．exhibiting B．exhibited C．was exhibited D．being exhibited
Poor as she was, she was eager for attention. Thus she had to think of borrowing some jewels to ______ at the party.
A．show up B．show out C．show in D．show off
A ______ identification card is required when you purchase foreign money from the Bank of China.
A．valid B．perfect C．beneficial D．flexible
It ______ me all of a sudden that I had left my key to the car in the office.
A．thought B．struck C．happened D．occurred
