— Air quality in our city is becoming worse and worse.
—Yes. These days' PM2.5 readings are frightening. We must do something to ______air pollution.
| A．reduce | B．remove | C．collect | D．gather |
There __________ great changes in our hometown in the past fifteen years.
| A．has been | B．have been |
| C．was | D．were |
We spend as much time as we can ______ English.
| A．read | B．to read |
| C．reading | D．have read |
Not only this boy but also the girls __________ Hawaii before in our class.
| A．have been to | B．has been to |
| C．have gone to | D．has gone to |
My brother’s never been late for work， __________?
| A．is he | B．isn’t he |
| C．has he | D．hasn’t he |
London， __________ capital of _________ UK， is a modern city.
| A．the， the | B．a， a |
| C．a， the | D．the， a |