3.听第二段对话,回答第7小题. Why does the boy think a mobile phone is helpful when he is alone on an island? A.Because he could call someone for help. B.Because he could know the weather report. C.Because he could listen to music.
20.听第四段对话,回答第9小题. Why does Mrs.Smith ask Mr.White not to sing loudly? A.Because her son is studying B.Because she wants to be quiet. C.Because she is working.