A. Such B This C That D So
Professor Smith, along with his assistants, ________ on the project day and night to meet the deadline.
________ your composition carefully, some spelling mistakes can be avoided.
It remains doubtful whether the project _____________ next month will bring profits to the company.
It is ___________ the customers’ needs that has made chain stores so popular in big cities in China.
The young man insisted that he _________ nothing wrong and __________ free.