There was____interesting program on____TV last night.
The WHO has given some advice on to prevent us being infected(感染)with H7N9.
When the parents arrived at the hall, the students _______ their projects.
Tom Sawyer let his friends _______ a long fence by playing a trick one afternoon.
There are three English-books on the shelf, but ______ of them is mine.
The manager asked him if he ________for the extra work the next weekend.