—Do you know the mission of the volunteers?—No. But I think _____ they will end up doing there will promote public awareness of environmental protection.
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.
Newspapers reported the news; __________, I think that's all nonsense.
If you __________ my advice, you __________ your failure now. You __________ your victory.