It has been estimated that only 21 percent of______world's land surface can be cultivated and that only 7.6 percent is actually under______cultivation.

On notification by Admiralty Notice to Mariners that a new edition of one of the books，or a new supplement to one，has been published，it should be obtained（）.

It has been held that the Shipowner will be liable for the loss of or damage to the goods even if this is due to excepted perils，unless he can prove that he has（）proper care of them whilst they were in his custody.

It has been ten years since the Labour Party came into（）in that country.

It has been decided that a collision due to any cause other than the negligence of the Shipowner or his servants is within the scope of（）.

Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.

It has been suggested that all government officials __ information on their income.

It has often been stressed in the Courts that the look-out man should，preferably，be stationed forward，unless weather conditions make this（）.

An IT manager has been trying to configure Cisco Unified CallManager Express without success. The IT manager has decided that there might be more success with the Automated Setup Utility. To start this process, what command should be executed first?（）

It has now become _________ to us that a mistake has been made.

It is vital that the assured can prove with certain documents that the claim has been caused as a result of the insurance coverage.

It is said that more middle school graduates will be admitted into universities，this is the information ____ has been put forward.

13. It has been predicted that nanomaterials will become the most materials in the 21st century.

It has been ________ that some government leaders abuse their power to get illegal profits for themselves.

It has been found that some people devote themselves so fully to their business success that they develop unhealthy eating habits.

It has been made clear that the major ob______ of the new government is to change public opinion, not least about the role of government itself.

It has been said that the A cts provided a mew course of action and did not merely regulate or enlarge an old one.

听力原文：In June, it was reported that the concert would be held in July. But now I heard it has been put off to August.

It has been arranged that____the following day.

It has been estimated that the earth’s surface temperature has increased ________ one quarter to three quarters of a degree since 1805.

It has been said that the Acts provided a new course of action and did not merely requlate or enlarge an old one.

It has been estimated that the earth's surface temperature has increased ______ one quarter to three fourths of a degree since 1850.

It ____ that the top quarter of a '53－metre－high statue of Buddha in Bamiyan, central Afghanistan has been blown down up by the country's ruling Taliban.

A machine originallyhad an estimated useful life of 5 years, but after 3 complete years, it wasdecided that the original estimate of useful life should have been 10 years. Atthat point the remaining cost to be depreciated should be allocated over theremaining:

Grant Company has decided to change the estimate of the useful life of an asset that has been in service for 2 years. Which of the following statements describes the proper way to revise a useful life estimate？