题目内容：

根据中文或首字母提示填入适当单词，或用词汇的适当形式填空。

1.To cross the _____(边界), you will need a valid passport.

2.A b_____ of friendship has been formed between them through the activity.

3.He was here for a week, but I was unaware of his e_____ until today.

4.We listened to the news with a _____ (mix) of surprise and horror.

5.Art classes help develop children’s powers of _________ (observe)

6.For forty years Jane has been ______(坦率) about making the rest of the world respect wild animals.

7.The last scene of the play was very _____ (impress).

8.Some villagers reported a huge snake, _____ (measure) over two meters long, was found dead in a nearby cave.

9.People have to learn to balance their work and _____(娱乐).

10.We should adapt ourselves to the new _____ (surround).