I can’t solve the math problem because it is too difficult. What should I do — _________ ask the teacher for help

The captain urged that the mission ______ before dark.

5. He said he had stolen the money but he couldn’t ______ the fact that the money was found in his house.

The lecture mainly deals with the trouble young children have ________ right from wrong.[ ]

This large sum of donation money will be given tolost their homes in the earthquake．