—Do you know anything about One Belt One Road?
—Yes, it ________ over 10 years since it started.
was
had been
is
has been
– She was mad _______me for _________her keys.
---How is your grandparents ? ----They are __________.
Don’t forget _________when you leave the classroom.
I don’t know if it _____tomorrow. If it ____, I will stay at home.
There are _________of nurses in our school but only _______of them are boys.