The word "breakthrough" is often used when talking about the newest drug or the next treatment ___ in cancer research．

___ the invention of the steam engine, the industrial revolution played a vital role in human history．

Blog, a shared on line journal where people can post diary entries about their personal experience and
hobbies, ___ more and more popular with people of all ages．

With the meal ________, the mother sat down for a good rest．

______ other good students, the teacher thinks, Alice is _______ student．

___ help the people in the snowstorm in the south made him worried．

Written in a hurry, ___________．How can it be satisfactory?

The students expected there ______ more reviewing classes before the final exams．

The company promised to pay some money for the customers __ ___ their shoddy（伪劣的）goods and ______ an apology in public．

Misunderstandings resulting from lack of social communication, if not ______ properly, may lead to serious problems．