The correct answer is: It was expected by Alexander that he would conquer the world.
This sentence is in the passive voice, whereas the original sentence is in the active voice. The meaning of the sentence remains the same, but the focus shifts from Alexander (the doer) to the expectation (the action).
Iskandar Mirza was confirmed as the Governor General of Pakistan on October 6, 1955.
He was the fourth and last Governor General of the Dominion of Pakistan, serving from October 6, 1955, until March 23, 1956, when Pakistan became an Islamic republic.
He was the first president of the Islamic Republic of Pakistan from March 23, 1956, until October 27, 1958.
Lord Mountbatten, the last Viceroy of British India, arrived in India in March 1947 with the primary objective of transferring power from British rule to Indian hands.
His instructions from the British government were to:
Try to preserve India's unity if possible.
If unity was not possible, to divide India into separate countries (which ultimately led to the creation of Pakistan).
The sentence "They will have been writing their letters" is in the Future Perfect Continuous tense, which is used to describe an action that will be in progress at a specific point in the future and will have started before that point.