根据中文提示，用词组的适当形式填空。

1. Children often have ________ ________ (许多)fun in the school sports meet.

2. The teacher said “You can ________ ________(上交) your homework tomorrow.

3. The bridge is ________ ________ of(由……组成) the stones.

4. ________ ________ (最后), we hold a party to celebrate New Year!

5. There are many kinds of animals ________ ________ (处于危险中).

6. Yesterday my teacher ________ me ________(把……错当成) my twin brother.

7. The doctor always ________ ________（检查）his patients carefully.