Since most Antarctic rocks are dark in color, they stood out _____ the white background and are easy to identify and collect.
| A．against | B．on | C．beyond | D．above |
__________ is important to a person is ___________ he must know _________ he is fit for.
| A．What; that ; what | B．That; how; what | C．It ; that ; that | D．It; what ; that |
Supermarkets are supplied with __________ red lucky gifts at the Spring Festival.
| A．plenty of | B．a great amount of | C．a great deal of | D．a great many of |
I thought my eyes must be playing tricks _______ me.
| A．with | B．on | C．for | D．to |
In the quiet darkness, I could hear someone _______ the door and go upstairs.
| A．open | B．to open | C．opened | D．to be opening |
Would you mind _______ some questions?
| A．for me to ask | B．of me asking | C．me asking | D．I asking |