He cut off the electricity immediately he found the dangerous situation, thus ____ a fire accident.
| A．prevented | B．to prevent | C．would prevent | D．preventing |
Peter’s shoes looked just the same as Jack’s, but it cost _____ his.
| A．as much twice as | B．twice as much as |
| C．much as twice as | D．as twice much as |
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 |