_____ for making so many mistakes in the exam, she was in low spirits.
Sam _____ some knowledge of the computer just by watching others working on it.
That’s the new machine ______ parts are too small to be seen.
—Do you think you could do without help? —______. This is not the first time for me.
Whom would you rather ________ with you, Jim or Jack?
On a rainy day I was riding my bike to pick up my son ___ a terrible accident happened ahead.