A giant helium(氦) balloon is telling residents of Paris how good or bad the air quality is. When it’s good, the balloon ----measuring 22 meters wide and 32 meters high---shines green. _________, it’s red.
【多选题】中美班 Unit 3 P.17-4 1.Sally and Mike carried their kayaks to the . 2. A lot of people were gathering to see the . 3. Sally and Mike were the to go down the river. 4. Both of them this sport.