After 15 years in the USA, he has finally decided to American citizenship.
| A．concentrate on |
| B．apply for |
| C．look out for |
| D．appeal to |
We often provide our children with toys,footballs or basketballs, _______ that all children like these things.
| A．thinking | B．think |
| C．to think | D．thought |
The Olympic mascots are the Olympic flame, the fish, the panda, the Tibetan antelope and the swallow, _______ a close group of friends.
| A．to represent | B．representing |
| C．represented | D．represent |
I send you 100 dollars today,the rest _______ in a year.
| A．follows | B．followed |
| C．to follow | D．being followed |
Mary was caught in a traffic jam and by the time she arrived at the airport her father’s plane_______.
| A．took off |
| B．had already taken off |
| C．was take off |
| D．had already been taken off |
—Flight 331 _______.I’d better be on my way.Goodbye.
—Bye.Happy landing!
| A．was announced |
| B．is being announced |
| C．has announced |
| D．is announcing |