Emergency line operators must always _____ calm and make sure that they get all the information they need to send help.
“Sorry, sorry…,” he whispered, ________ talking to himself.
Little ________ about his own safety, though he was in great danger himself.
________ to use in April, 2010, the road has solved the long-standing problem of traffic jamsof this area.
People are puzzled ________ they read the book.
The soldier was of running away when the enemy attacked.