_______ apple four hundred years ago led to the law of gravity while _______ apple designed by Steve Jobs has changed our life greatly.
He proved himself a true gentleman and the beauty of his __________ was seen at its best when he worked with others.
"We can't go out in this weather," said Bob,__________ out of the window.
It is widely accepted that young babies learn to do things because certain acts lead to __________.
There was such a long queue for coffee at the interval that we __________ gave up.
An invention is a new way of solving a problem, so try our best to think of many __________ and unusual ways.