— Susan, would you like to go hiking with us this afternoon?— I'd love to, but I study for a test.A. may B. have to C. can
How much time did you spend the new words in Unit 10?
---Someone is knocking at the door. Who may it be? ---It ______ be Tom. He is still in the school.
---Have you seen Dr. Adams recently?---No. He __________ Hong Kong for an important meeting. He’ll come back tomorrow.
--- Would you come back to have dinner with us this evening? --- I’d love to, ______ I have an important meeting .
There __________great changes in our hometown in the past fifteen years.