1 . He didn’t know the fact that the air is difficult to b________ (呼吸) at high altitudes. (根据中英文提示单词拼写)

2 . The fire made it difficult to r_______________(营救) the people trapped under the ruins in the earthquake. (根据中英文提示填空)

3 . You promised to __________ (运送) the goods to us, but we haven’t seen any of them yet. (根据汉语提示单词拼写)

4 . The campus was so beautiful that I decided to e______ it. （根据首字母单词拼写）

5 . The people of the country have voted to ________ (选举) a new president. (根据汉语提示单词拼写)

6 . I am writing to c________(确认) a booking for a single room for the night of 6 June. （根据中英文提示填空）

7 . As soon as we arrived on the island, we were eager to e________ in the woods. (根据首字母单词拼写)

8 . Try to_____________(平衡) your diet by eating more fruit and less dessert. (根据汉语提示单词拼写)

9 . You need to offer us new evidence to ________(证实) what you said is true. （根据汉语提示单词拼写）

10 . Efforts to ________(维护、保护) the peace have failed. (根据汉语提示单词拼写)