It is said that some taxi drivers purposely ignore passengers. I think it really needs __________.
| A．to regard | B．to be regarded | C．to regulate | D．to be regulated |
He is my father and I know he will forgive me for _______ I have done.
| A．whatever | B．no matter what | C．no matter how | D．whichever |
Charles is believed_______ the floor yesterday; he is always helping others silently.
| A．to sweep | B．to have swept | C．having swept | D．swept |
The _____ of electricity added to our difficulty repairing the bridge.
| A．absence | B．short | C．need | D．break |
After her son died in a car accident, the old lady would sit at the window, ______ out and _______ in thought.
| A．looked; lost | B．looking; losing |
| C．looked; losing | D．looking; lost |
.I found some old pictures at the back of my drawer which _____ memories of my childhood.
| A．called in | B．called up | C．called back | D．called off |