With the word “PM2. 5” constantly __________ in media reports, you might be wondering what on earth it means.
The theory he had stuck _______ to be true.
He came home after midnight, and ____, he was drunk. That made his parents very angry.
— How many students are going to the Great Wall? — ____.
— May I take your order?— Yes, I’d like a cup of coffee, a hot dog and some salad. What about you, Lisa?— ____.
—Henry, the phone is ringing . Do you want me to go? —No, sit still. ______.