David Smith wears casual clothes now, because _____.
Wentworth和Smith在1913年出版的教材中首次对棱柱做出了迄今为止最科学的定义。
Mr. Smith has bought a lot of books for his daughter, ______ he?
Mr. Smith()me to buy several eggs for the dinner.
Professor Smith promised to look()my paper, that is, to read it carefully before the defence.
— Has Mr. Smith had an accident? —()
Mr. Smith had an unusual _____ he was first an office clerk, then a sailor, and ended up as a school teacher.
Mr. Smith()a most important part in the development of our city.
Adam Smith was a professor of philosophy, a commissioner of customs, and founded the field of modern economics.