单项选择题 We have always laid ______ on maintaining the most professional standards when conducting business with our associates.

单项选择题 The personnel manager makes it clear that for security reasons, no one is allowed to enter the building ______ presenting a photo ID card.

单项选择题 107, I'm happy to announce that we are ______ finished with the construction of a new factory, which we hope can be set in operation early next year.