Don't press the red button ,_______you will set off the alarm.
When you are learning a foreign language, _______, you must forget your own language.
Great changes _______ in the city, and a lot of factories _______.
---How often do you go home? ---________.
I have two brothers, ________ are doctors.
My niece cares more for new clothes than anything else in the world, so she is very _______ about what she wears.