---How did you work out the difficult chemistry problem?--- I worked it out by ________.
_____ is it from your home to the nearest bus stop? ---About 10 minutes’ walk.
—Is Nancy doing her homework? — . She is watching TV.
Look! Emma is_______ her bedroom. Her room is always_________.
The monkey isanimal. It’scute.
There iselephant in the zoo.elephant comes from Africa.