The theory he ____ about black hole isn’t understood by most of people.A .put up B put down C put off D put forward
She and her family hid away for nearly twenty-five months _____ they were discovered.
It is the first time in a year and a half that I _______ the night face to face.
It was because I was ill ________ I didn’t go to school.
Along the way children ______ in long wool coats stopped ________ at us.
It was ______ to go down the hills.