A:①②
B:①③
C:①④
D:②④
中学生小丽经常“离群索居”,内心感到孤单寂寞,她很想改变自己的孤僻性格。你认为改变这种孤僻性格的最好办法是( )
按要求,填单词。
what's(完全形式)____
The U.S.A. is ______ country. English is spoken as the first language.