—Can we get everything ready by the weekend? —It all depends on _______ we can get Mr. Green’s co-operation.
Oh, Tom your face is very dirty.Look at yourself ___ the mirror.
Madame Curie and her husband continued to work __ all the discomforts.
Not only he but also you __ wrong.
This writer’s books are devoted ___ children.
No matter what happens, you should stick ___ your word.