The pen, _____ I paid 2 dollars, was lost.
| A．to which | B．for which | C．which | D．that |
Help others whenever you can ______ you will make the world a nicer place to live in.
| A．and |
| B．or |
| C．unless |
| D．but |
As far as I'm concerned, he ______ to be punished for what he has done.
| A．deserves |
| B．wants |
| C．should |
| D．needs |
The students handed in their test papers to their teacher ______.
| A．one after one |
| B．one after another |
| C．1ittle by little |
| D．step by step |
I bought a dress for only 10 dollars in a sale;it was a real ______.
| A．exchange |
| B．bargain |
| C．trade |
| D．business |
The parents had ______ their neighbour ______ their children when they were on holiday.
| A．left; take charge of |
| B．left;in the charge of |
| C．put;in charge |
| D．left;in charge of |