_____ you’ve a chance, you might as well make full use of it.
We’d be very grateful if you could join us because your cooperation will________the timely completion of our project.
As angry crowds got into the streets fighting for their basic rights, the local government________the police to keep order.
When you________, use a handkerchief to cover your nose and mouth. This is particularly necessary in public places.
Pictures on TV show the quake-hit capital________to ruins and helpless survivors waiting eagerly for relief.
Having worked as a doctor for so many years, Mr. White has________rich experience in battling with various diseases.