The floor is very dirty. Will you please ______?
Science is really _______ useful sucject although it is very difficult.
—__________ feels sad sometimes.—Yes, it’s normal to feel sad when something bad happens to us.
—Tom read the passage and found
—He was afraid of ________ in public.—But now he feels a little more confident.
—The summer vacation is coming in a few days. I’ll share the holiday with my daughter by traveling.—__ __