根据短文内容，填写所缺单词或用所给单词的正确形式填空。
Welcome to Daqing Wetland
Welcome 1. Daqing Wetland! This is a great place to watch birds. Look at the tall building over there. It 2. (be) the Bird Watching Tower. If you go inside, you 3. (see) many photos on the wall. These photos are about different kinds of birds. Some birds 4. (fly) in the sky now. Some 5. (sit) in the trees.
A kind guide is standing near the window. He is 6. (use) a telescope to look at a red-crowned crane. The crane is eating fish near the river. The guide says, “We must protect these birds. They are 7. (we) friends.”
On the desk, there 8. (be) some books about nature. The books are very 9. (interest). You can read them to learn more.
This place is very beautiful. I hope you 10. (have) a good time here.

1. to 2. is 3. will see 4. are flying 5. are sitting 6. using 7. our 8. are 9. interesting 10. will have

1. 考查固定搭配：welcome to + 地点是固定表达，意为“欢迎来到某地”，因此填to。
2. 考查一般现在时的be动词用法：主语It是第三人称单数，对应的be动词用is，因此填is。
3. 考查if引导的条件状语从句的“主将从现”规则：从句用一般现在时，主句要使用一般将来时（结构为will+动词原形），因此填will see。
4. 考查现在进行时：句中出现时间标志now，说明动作正在发生，主语Some birds是复数，现在进行时结构为are+动词现在分词，fly的现在分词是flying，因此填are flying。
5. 考查现在进行时：语境描述此刻鸟儿的状态，主语指代前文的some birds，为复数，现在进行时结构为are+动词现在分词，sit的现在分词是sitting，因此填are sitting。
6. 考查现在进行时结构：空前已有be动词is，后面需要接动词的现在分词形式，use的现在分词是using，因此填using。
7. 考查形容词性物主代词：空后有名词friends，需要用形容词性物主代词修饰名词，人称代词we对应的形容词性物主代词是our，因此填our。
8. 考查there be句型的主谓一致：be动词后接的名词some books是复数，对应的be动词用are，因此填are。
9. 考查形容词变形：空处在句中作表语，修饰事物books，需要把名词interest变为修饰事物的形容词interesting，意为“有趣的”，因此填interesting。
10. 考查一般将来时：hope后接宾语从句，表达对未来的美好期许，用一般将来时will+动词原形，因此填will have。