MBA英语周练(四)
1. The policeman is investigating the ____ about the traffic accident.
A. passer-by B. passers-by C. passer-bys D. passers-bys
2. This is the first time I ____ her sing. And I hope it is the last.
A. heard B. hear C. will have heard D. have heard
3. Dr. Jonathan, together with his assistants, ____ operating on the patient.
A. are B. is C. have D. has
4. My brother has just arrived. But I didn’t know he ___ until yesterday.
A. came B. will came C. was coming D. have been coming
5. By the time I got downstairs, the telephone _____.
A. stopped ringing B. would have stopped ringing
C. had stopped ringing D. stopped to ring