---Who is the girl standing over there ?---Well , if you ___know , her name is Mabel .
In order to complete the project ahead of time, the boss demanded that John __ extra hours.
When a new system _____, the old one is abolished.
His mother insisted that he _____ the money in the bank.
The police had to ____ the traffic for an hour due to a train accident.
It’s high time that they _____ some serious work right now.