-Where did you go _____ the morning of April 6?-I didn’t come to the office _____ the meeting was over.
—Now I really enjoy learning English. —Yeah! Just do it!
—Do you think it is hard for you to learn math well? —Yes. I really want to drop it.
—The river smells so terrible! How did it come about? —People used to pour dirty water into it.
—When will you set off to Shanghai, Linda? —Next Monday. I can’t wait!
—Look out! The bus is coming! —Thank you. I will wait a moment.