Professor Smith ___ China yesterday.

—You’re coughing badly，Martin. Why not give up smoking?—Give up smoking？Easier said than done，Amy. Once you ______ the habit of smoking，it is very hard for you to ______.

It was intolerate to_____the book.

The news of the mayor’s comong to our school for a visit was ______on the radio yesterday.

 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.