They had much difficulty ____________ the problem and they needed our help.
A. working out B. work out
C. worked out D. to work out
You’d better go to bed early. Don’t ____________ too late.
A. stay out B. stay up C. stay on D. stay away
He is very modest and he never ____________.
A. gets off B. takes off C. shows off D. turns off
World War Ⅱ____________ in Europe in 1939.
A. broke down B. broke in
C. broke up D. broke out
I don’t think it is a good idea. Can you ____________ another one?
A. come up B. come in
C. come up with D. come out
After working for ten years, my cousin became the CEO of a company ____________.
A. in his forty B. in his forties
C. at his forties D. at his forty
