题目

The policy of the mainland is very clear and straightforward,and the key problem is _____the leaders of Taiwan will accept it． A．that              B．how           C．why            D．whether      答案：D  考查名词性从句引导词。根据句意，应该是“台湾领导人是否接受”。  一节新干电池的电压是（ ）A．1.5VB．15VC．36VD．220V