Choose the correct words.
1.Your donations could/perhaps/mustn't change their lives.
2.She can/must/couldn't get an award for her courage. She's very brave.
3.Perhaps/could /might He will need our help.
4.The situation perhaps/may/can get better if we continue our campaign. We're not sure.
5.He must/couldn't/can't be at home. He isn't opening the door.
6.Helping other people can't /perhaps/can make you feel good.
7.I can't find my wallet, but it can/might /must be here sonewhere. I had it a while ago.
8.When you help a charity, you could/may/can not benefit personally, but you will feel good.
9.Could/Perhaps/Might something nice will happen to you today.
10.The government can/mustn't /may take action because a lot of people have singed the petition.