Leaves are found on all kinds of trees, but they differ greatly _______ size and shape.
Sam _____ some knowledge of the computer just by watching others working on it.
-----Have you been wasting time on computer games again?----- _______. I’ve been studying a lot and I need a break.
When I got on the bus, I_____ I had left my wallet at home.
Don’t leave her_____ outside in the rain.
As a child , Jack studied in a village school ,_____ is named after his grandfather.