After ten hours’ operation, the doctors managed to _____the one-year-old twins at the head.
| A． tell | B．separate | C．divide | D．Remove |
.He asked us to ______ him ______ carrying through his plan.
A help, inB help,onC assist ,inD assist ,on
.Please state your name, age and .
A entertainmentB accommodationC occupationD training
Only when he had done it ______ that he had made a mistake.
| A．he then realized | B．did he realize | C．before | D．he realized |
---Would you mind if I opened the door?
--- ________________.
| A．Yes, go ahead | B．No, go ahead | C．Yes, please | D．Never mind |
It is demanded that you ____ at six.
| A．will arrive | B．arrive | C．arrived | D．would arrive |