To ensure the future of mankind, it is crucial to
A. explore our planet’s abundant resources
B. adopt an optimistic view of the world
C. draw on our experience from the past
D. curb our ambition to reshape history
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请在第____处填上正确答案。
A. before
B. after
C. above
D. below
请在第____处填上正确答案。
A. selected
B. passed
C. marked
D. introduced
请在第____处填上正确答案。
A. issue
B. vision
C. picture
D. moment
请在第____处填上正确答案。
A. minor
B. objective
C. crucial
D. external
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