As there is 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 |
The boy ________ a blue jacket is John’s brother.
| A．wear | B．wore | C．wearing | D．wears |
All Paul’s money had been ________,so he had to make a living by begging.
| A．used up | B．taken up | C．made up | D．done up |
If you are ________ about Australia cities, just read the book written by Dr. Johnson.
| A．curious | B．anxious | C．mysterious | D．puzzled |
Mr. White will come to the party on Sunday, _______ he promised to every one of us.
| A．when | B．that | C．what | D．which |
Mary has recently got engaged ________ a foreign teacher, who has been engaged ________ education research for years.
| A．with; in | B．to; in | C．in; to | D．in; for |