All the economists are working on the financial crisis can be prevented, which has caused a huge loss throughout the world.
My English teacher's humor made every student __________.
A __________ is someone elected to speak on behalf of others.
The little boy saved every coin __________ he could buy his mother a present on Mother's day.
People often mistake some __________ objects such as kites or balloons for UFOs.
—Did you happen to see __________ black and __________ white cat? —Are they missing? I told you to take care of them.