1．The plane crashed killing all 157 passengers ________ (在飞机上)．
2．Two pieces of ________ (行李) have gone missing, which makes the woman very sad.
3．There is a national park on the ________ (边界) between Kenya and Tanzania.
4．My kids spend hours ________ (聊天) on the phone to their friends.
5．There are seven ________ (洲) in the world.
答案：1.aboard 2.baggage 3.border 4.chatting 5.continents
Ⅱ.语法填空
1．The problem the new teacher is faced with is that it always takes the class a while to settle________ at the start of the lesson.
答案：down 句意：这位新老师面临的问题是这个班在开始上课时总得一段时间后才能静下来。settle down安静下来。
