By the 2030s most people can ________ to live at least 80, which is a big leap for mankind.
Which class are you going to ____ after school?
--- Why! Where is my passport? Maybe I left it on the plane. --- My Goodness! You ________ things behind.
Which is ____ country, America ____ Canada?
语音辨析(2.5’)homeland
southern
agent
national
hear
________, he also had a son in college who had taken a bank loan to pay for his studies.