Fill in the blank with the appropriate modal verb: "She ___ speak Spanish fluently."

Choose the correct modal verb to complete the sentence: "You ___ eat too much junk food."

"I'm not sure, but I think he ___ be at home."

Which modal verb shows obligation in this sentence?

"You ___ finish your homework before watching TV."

What's the best modal verb to complete the sentence? "I'm tired; I ___ go to bed early tonight."

"It ___ rain later, but I'll check the weather report just to be sure."

"When she was young, she ___ swim very well."