—Do you know anything about One Belt One Road?
—Yes, it ________ over 10 years since it started.
was
had been
is
has been
The girl is new here and she lives _______. So she seems _______.
There are _______ books in our library.
I have two brothers. One is a worker, ________ is a driver.
You don't know the way. Why ______ the policeman for help?
Don't complain _______about your problems.