поставьте глагол в правильную форму...помогите плиз
1.They failed because of their lack of .........(prepare)
2.The ......... of space began in the 1960s.(explore)
3.The road was wet so the old lady had a ........(fall)
4.The UN is an international ......(organise)
5.Rose couldnt hide her ........at her exam results(disappoint)

1. They failed because of their lack of ......... (preparation. 2. The ......... of space began in the 1960s. (exploration) 3. The road was wet so the old lady had a ........ (fall) 4. The UN is an international ......(organization) 5. Rose couldn’t hide her ........at her exam results (disappointment)