. 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 |
They are young, but ____ they made it.
A.after all | B.in all | C.above all | D.for all |
The teacher’s words left us _______ .
A.think | B.to think | C.thought | D.thinking |
Would you explain _____?
A.the meaning to us | B.us the meaning |
C.us to the meaning | D.the meaning us |
She advised us _____ carefully in her class.
A.listen | B.listening | C.to listen | D.listened |
Many things were stolen and the theft _________ unreported.
A.became | B.left | C.got | D.went |