Hurry up, honey! We have to arrive at the airport by 11:00 o’clock, _____ we will miss the flight.   

—— Excuse me, is this Mr. Brown’s office? —— I’m sorry, but Mr. Brown＿＿＿works here.He left about three weeks ago.

There is little chance that we will manage to change the law.          , it is important that we try.

He was __ twenty when he was gone.

The newly­learnt words will be impressed on us only if they are ________used in everyday communication.