We still have a long way to go to solve all the problems _____________the Yangtze River.
| A．regardless of | B．in regard to | C．in search of | D．instead of |
_____ 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 |
See the model ship ____in the pool? That’s what my father made for me last weekend.
| A．float | B．floating | C．floated | D．to float |