1. It's hot inside the room. Let's go . 2. This ball is smaller. That ball is . 3. I am walking forwards but Danny is walking . 4. You sit down and I stand . 5. You skate quickly but I skate .
1. Is Lucy (sit) or standing? 2. Lingling (need) four train tickets. 3. Please (not sit) down. Please stand up. 4. Li Ming (be) ready for his trip now.