Welcome to the Science Museum, everyone! This stone axe _______ in South Africa and experts can’t be exactly sure about its use.
— Is that the middle school you often refer to? — Right, just the one ______ you know I used to study for years.
. It is the test system, ______ the teachers, that is to blame for the heavy burden of middle school students nowadays.
— May I help you? — Yes, I’d like to try on some sports jackets just like ______ I’m wearing.
Mr. Jones is on time for everything. How ______ it be that he was late for the opening ceremony?
We ______ last night, but we went to the concert instead.