Now, read the sentences with the different possibilities that modal verbs give to each sentence, see what happens in meaning. Only one is the most appropriate, but the other two are acceptable. Try and learn! Remember all are possible, but meaning changes.
Read the prompts and select the most appropriate option.
So, as you can see, modal verbs change meaning. Therefore, it is very important that you remember what each one means so that you can use the appropriate one.