My uncle _____ Germany on business many times.
| A．has been on | B．has gone to |
| C．has been to | D．has been in |
— What ____ heavy rain it was! —Yes, but I love _____ air after it rains. It smells so fresh.
| A．the, a | B．a, the |
| C．the, the | D．a, a |
--What else must we pay attention to ____ our school clean?
--We must not throw any litter onto the ground.
| A．keeping | B．kept | C．keep | D．to keep |
--I think Sam is the strongest student in our class.
--I agree with you, but who is the second ____ one?
| A．strong | B．stronger |
| C．strongest | D．the strongest |
Don’t be angry with your kid when he makes a mistake again, because ____ of us are perfect at all.
| A．none | B．neither | C．each | D．all |
--Have you phoned your brother?
--Yes. He ____ to be back next week.
| A．expects | B．is expected |
| C．will expect | D．is expecting |