Have you ever met with this case in your life you can't understand others even if they have said something several times？
| A．where | B．what | C．that | D．which |
I have searched ________ for the book but couldn’t find it.
| A．thoroughly | B．deeply | C．at ease | D．comfortably |
.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 |