Помогите с ин.яз.
Fill in the gaps with an appropriate modal verb
(must , mustn't , may , might , can , can't , need , needn't , (don't) have to , could , should)

1. Lena is not at school today , she _ be ill.

2. You _ not have finished you task , it's only 5 minutes since you have started .

3. You _ have asked your Mum's advise before buying this dress .

4. You _ to enter a password to register at this site .

5. Students _ talk at the lessons .

спасибо

1. She must be ill2. You couldn't have finished3. You should have asked4. You have to enter5. Students mustn't talk