单项选择题Duty is an act or a course of action that people () you to take by social customs, law or religion.
A. persuade B. request C. instruct D. expect
单项选择题—I thought you wouldn't mind. — Well, as a matter of fact, I don't, but you ______ me first.
单项选择题All of them try to use the power of the workstation ______ information in a more effective way.
单项选择题We()on this project for four hours. Let's have a rest.
A. are working B. have been working C. worked D. had worked
单项选择题Galileo lived in the City of Pisa, ______ there is a leaning tower about 180 feet ______.