His efforts to raise money for his program were ______ because, no one showed any intention to take a cent out of their pockets.
A. in place B. in sight C. in effect D. in vain
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
