Mr. Liu dreamed ____ a big house for his parents after they retire.
| A．to buy | B．to buying | C．of buying | D．of being buying |
The science of medicine _______ progress has been rapid lately is perhaps the most important of all the science.
| A．which |
| B．in which |
| C．that |
| D．with which |
Is this the reason _______ at the meeting for his carelessness in his work?
| A．he explained |
| B．what he explained |
| C．how he explained |
| D．why he explained |
This is Mr. White, _______ I think has something interesting to tell you.
| A．which | B．whom |
| C．that | D．who |
_______ has been announced, we shall have our final exams next month.
| A．That | B．As |
| C．It | D．What |
I walked in our garden, _______ Tom and Jim were tying a big sign onto one of the trees.
| A．which | B．when |
| C．where | D．that |