Itisnecessarythatthestudents____moreexcercisestodo.
A
【句意】学生们有必要做更多的练习。
【难点】虚拟语气可以用于主语从句中，常用的句型为：It +is(was)+形容词that…，主语从句中的谓语用(should)+v.的表达形式。
Peopleinsomeareasdon’thavetopayfortheir______.
The reason that his property was confiscated by the country, it ____, was that he was involved in a lot of fraudulent activities during the war.
Great as Newton was, many of his ideas ____ today and are being modified by the work of scientists of our time.
___ will Mr. Forbes be able to regain control of the company.