Not all parts of the interior (腹地) of Australia are easily _____, because it is very hot and not many people live there.
_____ in every aspect of his company’s business, Paul made himself busy day and night.
The traffic rule says young children under the age of four and ____less than 40 pounds must be in a child safety seat.
Canada is a country _____many different nationalities as well as one with foreign immigrants _____ the majority of its population.
Shortly after the accident, _____ policemen were sent to the spot to keep order.
Although he knew little about the work done in the field, he succeeded ____other more experienced experimenters failed.