This is a cheap and simple process(过程), ____ ,there are dangers.
| A．but | B．so | C．because | D．However |
Have you returned the book to the library ____?
--- Yes, I have ____ returned it.
| A．yet, yet | B．already, already | C．already, yet | D．yet, already |
When the teacher came in , the students about the new film .
| A．are talking | B．were talking | C．talked | D．talking |
The planehere for ten minutes already.
| A．has arrived | B．has stopped | C．has come | D．has been |
They borrowed a car _____ their neighbour.
| A．to | B．with | C．on | D．From |