从方框中选择正确的词,并用其适当的形式填空：

从方框中选择正确的词,并用其适当的形式填空：
（when ,speak ,develop ,clean ,large ）
1.I’ll go to England .It’s a good chance for me to practice （）English.
2.Our classroom （）by the students every day .
3.（）he comes ,I’ll wait for him .
4.English is changing with the （）of the world .
The United States has the （）number of English speakers .