This memorial was built ______ those heroes who laid down their lives for the liberation of the black.
We have to ________ the picnic because of the heavy rain.
You must turn off the gas after cooking. You can never be ______ careful withthat.
The car ran over a girl and her cat _____ were just crossing the road.
we_______a film next week.
------I am going to Shanghai for my holiday.------ __________! I wish I could go there ,too.