单选题 _______the challenge of advertising this event, over one million people in at least 65 countries are expected to join in the next Buy Nothing Day.

单选题 _______ of the students in our class ______ from the countryside of the city.

单选题 ---Who is on duty today? ---It's me. What's up?---Look. The blackboard needs _______ right now.

单选题 ---Our class got the first place in the 4*100 relay race! ---_______! Together we are stronger.

单选题 ---Did they win the badminton match yesterday? --- Not really. _____they all tried their best, they lost it.

单选题 ---Your new car is nothing but a ______ of money. ---I think your words are just sour grapes.

单选题 When father was young, he ______ from morning till night.

单选题 ______make the other students hear me clearly, I was encouraged to read aloud by our English teacher.