Until the start of the Industrial Revolution, mankind was poor, hungry, and constantly at the _______ of disease and natural disasters.
We will give every teacher space to develop.
I tried more than once to persuade the taxi driver to slow down, but he just __________ listen.
Large quantities of information, as well as some timely help ________ since the organization was built.
I ________ you how to deal with the matter, but why didn’t you ask me?
When I passed this afternoon, I saw a little boy was lying on the grass, his hands _____ under his head.