Task 6 Questions 26-30 Read the text below. For each question (26-30), choose the answer (A-I) that best completes the sentence. There are four letters that you do not need. Mark your answer on the answer sheet. There is an example at the beginning $(\mathbf{0} \rightarrow \mathbf{J})$. Marine Clocks Ships' captains of the $17^{\text {th }}$ century made long oceanic voyages calculating their latitude distance from the equator - by (0) ______ the night sky, but not knowing their longitude (distance from the prime meridian). An accurate clock keeping an exact record of the time at a ship's starting point was needed to determine this. However, contemporary clocks worked inaccurately in the poor conditions aboard sailing ships.The British parliament offered a reward of £20,000 to whoever (26) ______ invent a timepiece able to cope with the wide (27) ______ in temperature, pressure and humidity and so work reliably.The person who accepted the (28) ______ was John Harrison, a carpenter and clockmaker. Having already (29) ______ clocks with moving parts made from wood, he adapted his ideas firstly into a series of marine clocks, and some time (30) ______ watches, that became famous worldwide.Sadly, he never received the full amount of the prize, even though his clocks can be seen - still working - in London museums today. A self-educated provincial tradesman, he made powerful enemies in the Royal Society, who always underestimated his achievements.
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