Син.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 .
2. You couldn't have finished
3. You should have asked
4. You have to enter
5. Students mustn't talk