____ should be allowed to drive.
| A．18-year- old | B．18-years-old |
| C．18 years old | D．18-year-olds |
He ______ in the hospital.
| A．work | B．works |
| C．working | D．worker |
What does his sister ______?
| A．do | B．does | C．doing | D．Work |
—_______ does your mother go to England？
—By plane.
| A．How | B．What | C．Where | D．Who |
You should ____ hard.
| A．studies | B．studying |
| C．study | D．Studys |
I like playing ______ pipa.
| A．a | B．an | C．the | D．/ |