Even though there is________ fuel, the current rate of increase of energy consumption can’t continue for any longer.
They produced two reports, ______ of which contained any useful suggestions.
—How is your recent trip to Sichuan? —I’ve never had ______ one before.
The flowers ______ sweet in the botanic garden attract the visitors to the beauty of nature.
The ______ boy was last seen ______ near the gate of the park.
I’ve always treasured the watch______ to me on my eighteenth birthday.