Mr. Green _______ his lessons when I went into his office.
| A．prepares | B．prepared |
| C．is preparing | D．was preparing |
—Tom, What did you do last Sunday morning ?
— I _______ my grandma with my parents .
| A．visited | B．visit |
| C．will visit | D．have visited |
Ourteacher usually gets to school a little _______ than our students.
| A．early | B．earlier |
| C．earliest | D．the earliest |
We are often told_______ water in our daily life.
| A．save | B．saving |
| C．to save | D．saves |
There is ________wrong with my bike. I have to walk .
| A．something | B．anything |
| C．everything | D．nothing |