—I saw Mr. Green at school this morning. —No, it _____ him. He flied to Canada last week. A. can be B. must be C. can’t be
The population of Shanghai is larger than _____ of Shenyang.
—Have you seen my brother? —Yes. I _____ him in the library five minutes ago.
—_____ my daughter is only ten years old, she knows a lot. —What a clever girl!
The family was _____ poor _____ they couldn’t buy a TV set.
—Does your father still smoke? —No, he has succeeded in_____ smoking for three years.