---Look! It ________be Mrs. Smith. ---It _________be her. She has just gone to Shanghai. |
A. can; mustn’t B. must; can’t . must; mustn’t D. can’t; must |
---Look! It ________be Mrs. Smith. ---It _________be her. She has just gone to Shanghai. |
A. can; mustn’t B. must; can’t . must; mustn’t D. can’t; must |