题目内容

Hydrofoils can exceed 75 miles per hour, as compared with conventional watercraft, whose maximum speeds () approach 50 miles per hour.

A. are rarely
B. rarely
C. of rarely
D. they rarely

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Which of the following birds are mentioned as those that build nests that include unusual objects()

A. Ravens
B. Ospreys
Crows
D. Sparrowhawks

The word "it" in line 21 refers to()

A. biological productivity
B. oil
C. organic material
D. petroleum

The author mentions Vivaldi and Tartini in line 20 as examples of composers whose music()

A. inspired more people to play the violin
B. had to be adapted to the violin
C. demanded more sophisticated violins
D. could be played only by their students

Democratic governments constantly face the problem of balancing ()the individual with the needs of society.

A. the rights of
B. to the rights for
C. for the rights to
D. with the rights by

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