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As in the other Western Romance languages, the main plural expression is the suffix -s, which may create morphological alternations similar to the ones found in gender inflection, albeit more rarely. The most important one is the addition of -o- before certain consonant groups, a phonetic phenomenon that does not affect feminine forms: el pols/els polsos ("the pulse"/"the pulses") vs. la pols/les pols ("the dust"/"the dusts").
What is the usual way to make a plural?
A: suffix -s

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During the period between 1582, when the first countries adopted the Gregorian calendar, and 1923, when the last European country adopted it, it was often necessary to indicate the date of some event in both the Julian calendar and in the Gregorian calendar, for example, "10/21 February 1750/51", where the dual year accounts for some countries already beginning their numbered year on 1 January while others were still using some other date. Even before 1582, the year sometimes had to be double dated because of the different beginnings of the year in various countries. Woolley, writing in his biography of John Dee (15271608/9), notes that immediately after 1582 English letter writers "customarily" used "two dates" on their letters, one OS and one NS.
Why did the year sometimes have to be double dated after 1582?
A: unanswerable

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At the time of Australia's federation on 1 January 1901, Melbourne became the seat of government of the federation. The first federal parliament was convened on 9 May 1901 in the Royal Exhibition Building, subsequently moving to the Victorian Parliament House where it was located until 1927, when it was moved to Canberra. The Governor-General of Australia resided at Government House in Melbourne until 1930 and many major national institutions remained in Melbourne well into the twentieth century.
On what date was the first federal parliament convened?
A: 9 May 1901

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The Suez crisis and the choice of Eden's successor led in 1957 to the first major personal criticism of the Queen. In a magazine, which he owned and edited, Lord Altrincham accused her of being "out of touch". Altrincham was denounced by public figures and slapped by a member of the public appalled by his comments. Six years later, in 1963, Macmillan resigned and advised the Queen to appoint the Earl of Home as prime minister, advice that she followed. The Queen again came under criticism for appointing the prime minister on the advice of a small number of ministers or a single minister. In 1965, the Conservatives adopted a formal mechanism for electing a leader, thus relieving her of involvement.
When was a formal mechanism for electing the Minister adopted?
A:
1965