Finding information in today’s world is easy. The ______ is how you can tell if the information you get is useful or not.
When you’re learning to drive, _______ a good teacher makes a big difference.
He looked around and caught a man ______ his hand into the pocket of a passenger.
______ their service, the workers of the hotel are active in learning English.
_____ the flies out, we had to shut all the doors and windows.
_____ late in the morning, Mr. Smith turned off the alarm.