He has saved lots of people’s________ since he came to this hospital last year.

The dog is very ___, and it can work out the problem____.

--_______do you usually go to school? --_______seven o’clock _____the morning. 

 _____ number of the students is 4，0000  , much more than last year.

— ______do millions of online users visit the home page of the government for?— To read the news and search for the information they need.