______ twice a year,whether it is a car or a truck,is the rule that every driver must obey in this city.
For the past two years I ________ to help my two brothers
— Lucy, my good friend died in an accident yesterday.— .
Dressed in a newly-bought skirt, _________.
---It is not a secret that CEOs of major companies earn a large amount each year.--- I agree. ____ the hard economic times, it seems that their salaries have remained the same.
It is not difficult to ______ Mr. Huang from among a crowd because he is above average height.