—My son is addicted to computer games. He is hopeless, isn't he?
—Yes, ________ he is determined to give up and start all over.
| A．if | B．when |
| C．even if | D．unless |
_____ in the woods，the two girls were frightened and kept crying．
| A．Having lost | B．Lost |
| C．To be lost | D．Being lost |
I ______ to reach the manager for the last two hours but the line is always busy．
| A．tried | B．have tried |
| C．had tried | D．have been trying |
——How do you usually go to work？
——I usually drive，but if it is fine，I ______ by bike．
| A．will go | B．would go |
| C．have gone | D．had gone |
I fell asleep while working on this paper ______ the computer on．
| A．as | B．for | C．over | D．with |
______ me when you get it through and I’ll pick you up at your work place．
| A．Calling | B．Call |
| C．Called | D．To call |