It’s dangerous to walk across the street carelessly.—-You’re right. We can’t be _______ careful while crossing the street.

hero in this story is ugly duck.

__to attract young readers, the book is full of interesting stories and features simple language.

His best-known work that is ___ all praise can be seen in the museum

twice a year, whether it is a car ,a bus or a truck, is therule that every driver must obey in this city.