Any applicant form ______ properly will not be accepted by the company.
It takes us ________ hour or more to go to my hometown by ________ train.
Rather than ____ on a crowded bus, he always prefers ____ a bicycle.
. After class they will discuss the _____ to the study of physics.
By the end of 2007, about half a million people had flooded into the city, ____ up around 10 percent of its total population.
We must avoid _____ a bad impression on others in public places .