Singing with Sun Yang, the swimming champion , face to face is an unforgettable moment, ________the little girl always treasures.
| A．one | B．this | C．that | D．it |
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 questionnaire takes ______ ten to fifteen minutes to complete and can be used along with the assessment interview.
| A．mainly | B．punctually | C．approximately | D．precisely |
As there is less and less coal and oil, scientists are exploring new ways of making use of ______ energy, such as sunlight, wind and water for power and fuel.
| A．primary | B．alternative | C．instant | D．unique |
In our class, when the bell rang and the teacher closed his book, it was a ______ for everyone to stand up.
| A．signal | B．chance | C．mark | D．measure |
Hiking by oneself can be fun and good for health. It may also be good for ______ building.
| A．respect | B．friendship | C．reputation | D．character |