It is generally believed that a successful Olympic Games            relies on well-performed IT services.

 Process has been very smooth. ______, we are not confident that it will be completed on time.

It was foolish of you to take a taxi ______you could walk there in five minutes.

Running a company is not ______ a matter of hiring people---they also need to be trained.

. John hadn’t been able to quit smoking at once; he had to control his smoking desire      .