【題目】—Excuse me. What do you think "upset" means?

【題目】Throwing the litter h________ and there is a bad habit.

【題目】If you need any help, please call me ________ 010-5558 6390.

【題目】One t________ can’t make a forest, so we need teamwork.

【題目】It’s a good habit for us that we should never ________ today’s work till tomorrow.

【題目】Most Chinese think the color r________ is the symbol of good luck.

【題目】—Have you ever been to a concert?

【題目】—Is this Mike's dictionary?

【題目】To live a low— carbon（低碳）life, we should t________off the lights when we leave the room.

【題目】—You can’t imagine _____ when she heard the good news.