You’d sound a lot more polite if you make a request ______ a question. 
| A．in search of | B．in the form of |
C．in need of | D．in the direction of |
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 |
It is believed that _____ European scientist invented _______.
| A．an; a television | B．a; a television |
| C．an; the television | D．a; the television |