一、单项选择。
(    )1. This is Mr White. He is from        .
     A. American     B. USA        C. the USA
(    )2. — Which country do you like to visit?    
— I’d like to visit            .
     A. Australia       B. Australian       C. the Australia 
(    )3. Nancy and David are from the same                  , and Ben and Liu Tao are from different                    .
A. country; country  B. country; countries    C. countries; country 
(    )4. The children talk      their friends in English.   A. in B. with C. at