_____, about forty people travel in one bus, while the same number occupy thirty-three cars.
Population experts say that by 2050 the world will have about 2 billion people aged over 60,____as today.
In remote mountainous villages in China, it is not ______ to find families with men wearing thick moustache, shabby clothes and worn shoes, chewing tobaccos and with porridge as their main daily food.
In an amusement park you can ______yourself with a variety of facilities, ranging from trolley buses to roller coasters.
She _____ what had happened in a low voice for fear ________ she said might be overheard by others
The star performer of comic dialogue is full of humor, who is able to ______an occasion whenever _____ go wrong with his humorous performances