【单选题】
I have spent a lot of time_______repairing the machine.
【单选题】
23. The singer and dancer ____ our evening party.
【单选题】
We should be pleased to send you some samples of our new printers on approval, _______ our own expenses.
【单选题】
Did you bring your ( ) from high school?
【单选题】
It was in the school library ____ I came across John.
【单选题】
By the end of next month he ____ everything in school.
【单选题】
The child had difficulty [] his way to school.
【单选题】
A new school was _____ up in the village last year.
【单选题】
Middle school students aren’t ______ to smoke.
【单选题】
( ) the power cuts, the school continued to function normally.