--- Who is over there in the dark?---_____. What you saw is just a chair.
Sherlock Holmes asked the suspect what he ___ when the murder took place.
Helen encouraged me to speak English as much as possible because practice ___ perfect.
With the development of modern industry, there will be ___ living space for wild animals.
Audrey Hepburn, one of the greatest actresses, was ___ to take on challenges in her life.
--Wow, so many new buildings! But it used to be a poor village.--Yes, ___ has changed in our hometown.