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 |
____ I really don’t like art, I find his work impressive.
| A．As | B．Since | C．If | D．While |
I have offered to paint the house ____ a week’s accommodation.
| A．in exchange for | B．with regard to | C．by means of | D．in place of |
I can't say which wine is best -- it's a(n)of personal taste.
| A． | affair | B． | event | C． | matter | D． | variety |
Please remainuntil the plane has come to a complete stop.
| A． | to seat | B． | to be seated | C． | seating | D． | seated |
It’s the sort of work that ____ a high level of concentration.
| A．calls for | B．makes up | C．lies in | D．stands for |