it is normal for parrots to talk, Einstein, a small bird, is unusual in that whenever she hears a new word or sound, she repeats it over and over until she masters it.
.The petrol tank is empty.I _________it up before we left home.
Driving a car is not as difficult as you imagine,if you_________ the rules.
When Mr.Jones gets old,he will _________ over his business to his son.
Mrs.Brown is supposed _________ for Italy last week.
The water of a hot spring carries many minerals,usually _________ us an unusual taste and smell.