See the flags on top of the building? That was _______ we did this morning.(2006年全国I高考题)
When I went home after work, I found my house ______ but strangely, nothing had been stolen.
The manager told us that _______ careful we are, ________ mistakes we’ll make.
Personally I think the ______ Andrew drew from his simple experiment is not scientific.
It is one of the funniest things____ on the Internet so far this year.
They were surprised that a child should work out the problem____ they themselves could not.