The opening ceremony is a great occasion. It is essential ________for that.

A ． for us to be prepared B ． that we are prepared

C ． of us to be prepared D ． our being prepared

答案

A

【详解】考查虚拟语气及固定句式。句意：开幕式是一个伟大的时刻。我们必须为此做好准备。 A.for us to be prepared 让我们做好准备； B.that we are prepared 我们准备好了； C.of us to be prepared 我们要做好准备； D.our being prepared 我们做好准备。虚拟语气用于主语从句中， it is essential+that 从句，从句的谓语动词应用（ should ） + 动词原形， should 可省略。故选项 B 不对；固定句式： it is+ 形容词 +of/for sb +to do sth. 而 essential 后面应用 for 。故选 A 。