------I don’t know why he has made such a silly mistake in the exam.
------ He ____________ it before he handed in the paper.
| A．may have checked | B．might check |
| C．must have checked | D．should have checked |
Only when ______ in 1918, ______ happily back to work.
| A．the war was over … he went | B．was the war over … did he go |
| C．the war was over … did he go | D．was the war over … he went |
The boy would have died, _______ on him without delay.
| A．if the doctor didn’t operate | B．if the doctor wouldn’t operate |
| C．would the doctor not operate | D．had the doctor not operated |
Do you mind ______ how you succeed?
| A．if I go and see | B．if I go seeing | C．my going and see | D．my go to see |
The police saw the woman _______ a bus and _______ a taxi.
| A．get off …get on | B．get on … get off |
| C．get off …get into | D．get on … get into |
We have _______ books in our library.
| A．plenty of | B．great many | C．a great deal of | D．great number of |