In April,2009,President Hu inspected the warships in Qingdao,________ the 60th anniversary of the founding of the PLA Navy.
Better wear special clothing, a helmet and a life jacket, just ______ your raft gets upside down or even sinks.
I found that the homework was ______ I used to get in my old school.
Though the medicine for my disease______, I should often______ at home or in the open air.
We’ve booked a room in the center of town for the guests ______they can stay for three days.
Just in front of our house ______ with a history of 1000 years.