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.
Mary is a (n) __________ customer, so the waiter knows her likes and dislikes.
The number of students applying for this position __________ 320.
We offered these students a summer course, aimed __________ improving their spoken English.
__________ to go to university, we must work hard.
The explorers were told to __________ themselves with everything they would need for the voyage.