Some of you may have finished Unit One.________,you can go on to Unit Two.
Because natural disasters occur at random times, it is difficult to warn people _______.
— I would never go to that supermarket again. The quality of the goods there is too poor.— _______.
Many road accidents occur because drivers cannot ______ the speed of approaching vehicles.
—Betty told me the last mountainous bike you preferred to yesterday was bought by John.—Oh, my! How I regret that I didn’t buy ______.
Things go back to ______ since we paid off all our debts.