—Can I drive on the free way, Mr. Green?—You can when you____________ a bit more skilled.
Both of my parents prefer _______ news to foreign news when they listen to the radio..
Instead of answering, she ______ smiled.
The patient suffering from cancer looked dead but the faint pulse proved that he was still________.
The continuous rain ______ the harvesting of the wheat crop by two weeks.
In 1989, a(n) _______law was passed by the United Nations to stop people putting waste into sea.