On Nie’er Square, there are always many people dancing together if it _______ in the evening.
Our English teacher is ill, so Mr. Smith will take her class _____.
The boy was made _____ the new words twenty times.
Bad habits will get _____ the way of your life.
You must concentrate _____ your study not on your clothes.
There are so many beautiful clothes in the store. I really don’t know _____.