By saying "more challenging" in the last paragraph the author means that undersea exploration is ______
A. more interesting
B. more attractive
C. more demanding
D. more dangerous
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Which of the following describes the author's probable attitude toward Sir Christopher Wren's plans？
A. He feels it would have been a mistake to rebuild London according to Wren's designs.
B. He feels it was a mistake for London not to have been rebuilt according to Wren's designs.
C. He feels that someone other than Wren should have been chosen to plan the rebuilding.
D. He feels that Wren's ideas had much more influence than is commonly acknowledged.
Which of the following is NOT mentioned in the passage？
A. New techniques are continually developed and new machines invented for undersea exploration
B. If not well built, a submersible is likely to get crushed in deep water.
C. A submersible, when manned, looks very much like a spaceship.
D. In certain respects, undersea exploration is often faced with the same problem as space travel is.
A．Not comfortable.B．Rather crowded and slow.C．Interval is long.D．Cannot reach suburban
A. Not comfortable.
B. Rather crowded and slow.
C. Interval is long.
D. Cannot reach suburban areas.
A．He and his friends have never worn Adidas.B．Adidas is only for great sports players
A. He and his friends have never worn Adidas.
B. Adidas is only for great sports players like the Chicago Bulls.
C. Adidas helps sports players do better.
D. He has always wanted to wear Adidas shoes.
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