When the teacher came into the classroom, the students .
| A．stop to talk | B．stopped to talk | C．stopped talking | D．stop talking |
—_____ does Kangkang meet his friends?
—Four times a month.
| A．How often | B．How long | C．When | D．What time |
The boy likes playing _____ basketball very much.
| A．a | B．an | C．the | D．/ |
Bob often _____ his homework after dinner.
| A．do | B．does | C．doing | D．to do |
The Browns usually drive to the park on Sundays. But today they go to the park_____ foot.
| A．in | B．on | C．by | D．of |
If we do nothing, the oceans ______ fish desserts.
| A．become | B．became |
| C．will become | D．are becoming |