It’s time for class. Mr.King asked all the children______down quietly.
| A．sit | B．to sit | C．sat | D．sitting |
Doctor Wang operated _______my mother yesterday.
| A．in | B．at | C．for | D．on |
— Where is your boss? I haven’t seen him for several days.
— He ____ to Shanghai on business.
| A．has been | B．is going |
| C．has gone | D．went |
It was raining heavily, _____ we decided to stay at home and watch TV.
| A．but | B．or | C．because | D．so |
Dr Bethune came to China ______the Chinese soldiers and gave his life to ____Chinese.
| A．treated ,helped | B．treating, helping |
| C．to treat, helping | D．to treated, help |
I asked Jim and Bob to come to my house for dinner , but ____ of them came .
| A．neither | B．either | C．none | D．both |