Choose the underlined word or phrase in each sentence that needs correcting

B1: Choose the underlined word or phrase in each sentence that needs correcting:

1. I (A) spent two days (B) to finsh (C) the model (D) of a stilt house
2. Athought (A) it rained (B) heavily (C) but they still (D) went camping
3. She said she (A) will work (B) for a (C) charitable organization ​when she (D) grew up
4. They (A) are working very (B) hardly (C) to prepare (D) for the new project.
5. (A) The students (B) in my class (C) are looking forward (D) to hold mid-autumn festival