24. When we climbed up to the top of the mountain, we were all _______.
| A．tired and out of the breath | B．tiring and short of the breath |
| C．tired and out of breath | D．tiring and short of breath |
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 |
I like the colour of the cap ______ I dislike its design.
| A．while | B．if | C．despite | D．as |