Ex. 6 Use the required active or passive forms in the follow­ing texts

I. Nearly a quarter of a century has passed since this book first (to publish). During this period several hundred thousand copies of the book (to dispose) of, and it (to sell) practically in every country in the world where English (to teach) as a second language. Nevertheless, the twenty-fifth anniversary is so important an occasion that it (to commemorate) with the publication of the new edition, which throughly (revise) and considerably (to enlarge). Additional sections (to include). Another innovation is that a list of irregular verbs in everyday use (to introduce). These verbs intentionally (to place) as endpapers for easy reference. Besides, the opportunity (to take) of revising the book from cover to cover, bringing it up to date and introducing many little improvements here and there. Much care (to give) to the preparation of the Index, which it (to hope) will make the book a useful work of reference. The writer is of the opinion that the best results (to achieve) if it (to use) by the students both as a text book and as a book of reference.

II. At the last glow of sunset, they (to board) the aeroplane in inverse order of seniority beginning with the sergeant and ending with General Spitz. The plane they (to provide) with was luxuri­ous for the wartime. It (to fit) with seats. Little lights (to glow) along the roof. Soon the doors (to shut). The lights (to go) out. It (to be) now completely dark. What once (to be) windows (to paint) out. The roar of the engine (to impose) silence on the party. Dan, who (to put) himself next to the cockpit, (to long) for a forbidden cigarette and (to try) to compose himself for sleep, though it (to be) far from his normal bedtime. He (to wear) the same shirt all day without a chance of changing. In the hot afternoon it (to be) damp with sweat. Now in the chill upper air it (to cling) to him and (to set) him shivering. It (not to occur) to him to bring his greatcoat. It (to be) an unsatisfactory day. He (to wander) about the streets of the old town with the Lieutenant. They (to lunch) at the club and (to order) to report at the airfield two hours before they (to need). He (not to dine) and (to see) no hope of doing so. He (to sit) in black boredom and discomfort until, after an hour, sleep (to come).