摘要： Mr. Li England. He London for two weeks. A. has been to, has been to B. has gone to, has been in C. has been to, has been in D. has gone to, has been to
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--- Look, the light in the teacher's office is still on. Mr Li is working there. He always works late at night.
--- It ________ be Mr Li. He has gone to London for a short visit.
- A.can't
- B.mustn't
- C.may
- D.must
---Who is the person to ________ you just talked?
---It's Mr Li.
- A.who
- B.whom
- C.where
- D.which
---Mr. Li, may I go home now?
---No, you ________. You should sweep the floor first.
- A.can't
- B.must
- C.needn't
- D.can