Remove the batteries when they become weak or when the unit is not in use for extended periods. This will damage to the unit from battery leakage at such times.
The teacher reported to the headmaster how the class meeting ________ the day before.
There was never any time for Kate to feel lonely, _____ she was an only child.
–No.3 player runs quite fast. --Yes, but there’s no doubt _____ Liu Xiang will win in the end.
Are you ________ of the mistakes you made in your final English test?
Some of this heat near the earth’s surface _________ make electricity.