I make most of my money by writing books but I do __________ magazines sometimes.
| A．refer to | B．see to | C．contribute to | D．add to |
Most of the evidence was destroyed in the fire. _____, it would be almost impossible to prove Jim guilty.
| A．Anyhow | B．However | C．Besides | D．Thus |
_____ life exists on any other planet in the solar system still remains a question.
| A．Why | B．Whether | C．How | D．Where |
It was almost midnight when a fire _____ in the neighborhood.
| A．blocked out | B．turned out | C．broke out | D．died out |
There is a peaceful and calm _____ in the country, quite different from that of a big city.
| A．climate | B．atmosphere | C．system | D．situation |
Jack was in low spirits those days and his friends did all they could _____ him up.
| A．cheer | B．cheering | C．cheered | D．to cheer |