同类型题：
It was to Maury of the US Navy that the Atlantic Telegraph Company turned, in 1853, for information on this matter. In the 1840s, Maury had been responsible for encouraging voyages during which soundings were taken to investigate the depths of the North Atlantic and Pacific Oceans. Later, some of his findings aroused much popular interest in his book The Physical Geography of the Sea.
23. The aim of voyages Maury encouraged in the 1840s was __________.
A) to make some sound experiments in the oceans
B) to collect samples of sea plants and animals
C) to estimate the length of cable that was to be made
D) to measure the depths of two oceans
23. A primary nurse can propose a different approach of treatment when _______.
A) the present one is refused by the patient
B) the patient complains about the present one
C) the present one proves to be ineffective
D) the patient is found unwilling to cooperate