__________ in 1636, Harvard is one of the most famous universities in the United States.
--- The sign says no one park here. --- Oh, I’m sorry.
A11 the preparations for the task , we are ready to start.
such a difficult problem, he didn’t know what to do.
The purpose of new technologies is to make life easier, it more difficult.
They searched in the forest for a whole day, to find the three children who had lost their way the day before.