_____ I know the money is safe, I shall not worry about it.
| A．Even though | B．Unless | C．As long as | D．While |
I don’t want to _______ money on such books.
| A．cost | B．pay | C．spend | D．take |
He had ______ in finding Mr. Green’s house.
| A．many difficulties | B．many difficulty |
| C．much difficulties | D．much difficulty |
——Who telephoned just now?
——Sorry. I couldn’t ______ the voice.
| A．recognize | B．realize | C．know | D．understand |
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 |