All the government leaders and policemen in Thailand must see to ______ that every citizen should stay safe and sound in the terrible flood.
________ that I was a regular visitor, the servant let me in.
David and Jack, _____so much alike each other, were often considered _____ twin brothers.
Can you _____ the capitals of all the countries?
The soldier was _____ in the battle.
________ he seems to know everything.