---There are a lot of _________ of bike riding.
---I agree. It’s good for the environment and it saves money.
| A．instructions | B．instruments |
| C．advantages | D．products |
Mary __________ to school on foot every morning.
| A．go | B．goes | C．went | D．will go |
—Lucy, let me __________ a look at your new watch.
—Ok, dad.
| A．has | B．have |
| C．to have | D．having |
__________ of his parents are doctors.
| A．Each | B．Both | C．All | D．Some |
—__________ she sing English songs?
—Yes, she can.
| A．Can | B．Must | C．Need | D．Should |
This box is __________ than that one.
| A．heavy | B．heavier |
| C．heaviest | D．the heaviest |