My 6-year-old daughter went to the dentist’s nervously, but the smiling doctor put her __ in no time

下列各句中加点成语的使用，恰当的一句是

ad construction is based on the agreement, oneof _______ purposes is to ensure its completion on time

The Olympic champions_____ all the audience excited at 2004 Olympic Games.

Everyone in this country should work hard and do what they can _____ against national smog.