单选题 John is a ______ employee. Whenever you see him, he is buried in his work.

单选题 We have provided students with opportunities to ______ what they are learning in class to practice.

单选题 West Merica Police want more people to ______ to work alongside local officers.

单选题 In China, elders are traditionally treated with great respect and ______.

单选题 China and the EU agreed to ______ cooperation to meet key environmental challenges such as air, water and soil pollution.

单选题 Few people can afford to go on a(n) ______ around the world.

单选题 Leadership is about the ability to ______ change.

单选题 Worldwide, only 19% of people ______ are estimated to wash their hands with soap after going to the restroom.

单选题 However, when we look a bit deeper, problems begin to ______.