The rise in electricity costs has _______ our difficulties in carrying out the project.
| A．added up | B．added up to | C．added | D．added to |
41. —Well, it's getting late. I must be going. Thank you again for inviting me to the party.
—________
| A．Oh, it's already so late? |
| B．Thank you for coming. |
| C．Oh, sorry you could't come. |
| D．I really had a happy time. |
40. —Shall Tom go and play football?
—Not ________ he has finished his homework.
| A．when | B．if | C．unless | D．once |
39. Was ________ Bill, ________ played basketball very well, ________ helped you repair your bike?
| A．this; that; who | B．it; that; it |
| C．it; who; that | D．this; who; who |
38. —You've left the light on.
—Oh, ________. I'll go and turn it off.
| A．so do I | B．so I have |
| C．so have I | D．so I do |
37. No one can be sure ________ in a million years.
| A．what man will look like |
| B．what will man look like |
| C．man will look like what |
| D．what look will man like |