---What have you learned from your experience in the USA?---Well, meeting people from another culture ______ be very difficult.
Last week, only two people came to look at the house, ____ wanted to buy it.
The English play ____ my students acted at the New Year’s party was a great success.
There are two buildings, ____stands near a hundred feet high.
It was a really ____ experience. Afterwards everybody was very ____.
All the books are not useful. Which of the following has the same meaning as this sentence?