—Hi, Mary. It never entered my head that you’d come. What a surprise!—I’m on a business trip in the city and I ______ in on you.
—What are you going to do this weekend? — . If time permits, I may go to Shanghai with my friends.
Little Johnny felt the bag, wondering what it ________ .
His brother ___the army since 2012.
It is believed that life in the twenty-first century is much easier than ________ .
When _____ Chinese culture with other cultures, we often pay attention only to the differences without noticing the many similarities.