Let’s clean the classroom. It’s very ______.
--Would you please give me a hand and take the bookcase upstairs?-- _____.
My son is a basketball fan. He’s interested in any news _____is about NBA Playoffs(季后赛).
--There may____ two new schools in the neighborhood.-- I hear that one is a primary school, the other is a high school.
I will go on with the experiment unless my mother _____ me to stop.
____ they are working ! We should learn from them.