A huge balloon is telling people in Paris how good or bad the air quality is. When it’s good, the balloon shines green. ,it’s red.
I was really anxious about you. You____ home without a word.
—May I smoke here? —If you _____, choose a seat in the smoking section.
If you cheat in the exam, you’ll never_____ it.
Would you please keep silent? The weather report ________ and I want to listen.
__________the teacher entering the classroom, the boy pretended _______ the text.