--- I wonder how much you charge for your service.
--- The first two are free ______ the third costs $30.
| A．while | B．until | C．when | D．before |
In the west, people make _______ a rule to send Christmas present to their relatives and friends.
| A．this | B．that |
| C．it | D．the following |
_______ was known to them all that William had broken his promise ______ he would give each of them a gift.
| A．As; Which | B．What; that |
| C．It; that | D．It; which |
“Look at that lady on the stage. She’s already forty.” “You are joking. She doesn’t look ________.”
| A．so | B．it |
| C．that | D．this |
Why don’t you bring ______ to his attention that you are too busy to do it?
| A．this | B．what |
| C．that | D．it |
They live on a busy main road. ______ must be very noisy.
| A．There | B．It |
| C．That | D．They |