A reminder is something which reminds somebody______somebody or something else.
| A．from | B．for | C．with | D．of |
The novels written by the author sell best, but five years ago no one could have imagined how great a role he________in the literary world.
| A．was playing | B．played | C．was to play | D．had played |
He turned down the request of his friend because it was________the limit of his power.
| A．beyond | B．over | C．off | D．above |
If you had worked hard, you ______ so anxious now．
| A．are not | B．would not have been |
| C．will not be | D．would not be |
______ I'm willing to help, I do not have much time available．
| A．While | B．When | C．Once | D．Since |
The rise of oil prices made scientists search for new energy resources ______ oil．
| A．replace | B．replacing | C．to replace | D．replaced |