Please refer to the before you switch onthe engine

I_____the problem _____in my mind for a whole week before I did anything about it.

With so many problems ____, the newgovernment is in rather a difficult situation.

I’m sure Jack can win the competition this term.—Yes, I agree. _________ he works in his free time!

e often don’t appreciate what they have, do they —No, _____ they lose it.