To keep safe _______ an earthquake, you should remain at a spot in your room where nothing may fall on you.
___ difficult the task may be, we must fulfil it this month.
“_____ when does the pub stay open?” “About midnight.”
___you understand this rule, you will have no further difficulty.
“Shall we stop for lunch _____ shall we drive on?” “Let’s stop for lunch, but the driver can’t drink _____ drive.”
____ you work, you must always serve the people heart and soul.