_____ more and more scientists carrying out large-scale scientific research, the space industry will become more promising.
As
Because
C. With
D. Since
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I feel that when there are so many better people for the chairmanship, I should step ________.
A. apart
B. outside
C. off
D. down
Like all the plans I will suggest, it is not ______; this is part of a long, north-east facing border in my own garden.
A. imaginary
B. imagine
C. marine
D. imaginable
One of his eyes was injured in an accident, but after a ______ operation, he quickly recovered his sight.
A. delicate
B. considerate
C. precise
D. sensible
Over half of the population of the country ________ in traditional sports.
A. takes
B. practices
C. goes for
D. participates