_______ for the breakdown of the school computer network,Alice was in low spirits.
| A．Blaming | B．Blamed |
| C．To blame | D．To be blamed |
Helen had to shout _______ above the sound of the music.
| A．making herself hear |
| B．to make herself hear |
| C．making herself heard |
| D．to make herself heard |
Just then,another man, _______ behind the first,spoke up，“Who are you?”.
| A．sitting | B．to sit |
| C．sat | D．having sat |
You were silly not _______ your car.
| A．to lock | B．to have locked |
| C．locking | D．having locked |
—Can the project be finished as planned?
—Sure, _______ it completed in time, we’ll work two more hours a day.
| A．having got | B．to get |
| C．getting | D．get |