Itisnecessarythatthestudents____moreexcercisestodo.
A、haveA
【句意】學生們有必要做更多的練習。
【難點】虛擬語氣可以用于主語從句中，常用的句型為：It +is(was)+形容詞that…，主語從句中的謂語用(should)+v.的表達形式。
When I got out of the car and walked about among them, ____one old man who shook his head disapprovingly, they all began to cheer .
The foreigners _________there, but they _________the food there at first.
I am ____grateful for the many kindnesses you have shown my son.
Nowhere but in the remotest region of the country ____find a place to settle down.
You ’d better sing. It doesn’t ______ whether you can sing well or not.
