Choose the correct answer.

“You ..... be late for work”
"I know. I'm leaving now."
1. needn't
2. must
3. mustn't
“Jim … lose some weight. His doctor said so”
"Then he must go on a diet.”
1. mustn't
2. can
3. has to
"I … go to the bank today. I have enough money."
"Well, I'll go alone, then.”
1. needn't
2. have to
3. must
“I … clean the house today. It's dirty”
"I'll help you”
1. needn't
2. must
3. mustn't
"I … feed the dog at lunchtime. My brother did it in the morning.”
"You can do it this evening, then.”
1. didn't need to
2. needn't have
3. need
"Can I talk to you, please?"
“Sorry I … go now. I'm late for a meeting”
1. mustn't
2. has to
3. must
"Where's Tom?”
"He's not at work, so he … be at the library”
1. must
2. can't
3. can