_____ in the queue for half an hour,Tom suddenly realized that he had left his wallet at home.
In 1939,Hitler________ war against Poland,which started the Second World War.
Try to________ at least an hour each day for learning new vocabulary.
My sister was against my suggestion while my brother was________ it.
He was educates at the local high school, after _____he went on to Beijing University.
--I would like to buy an expensive camera.-- well, we have several models to choose____.