It is vital that every piece of equipment ________ before the experiment.
A．is checked
B．will be checked
C．be checked
D．must be checked
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
根据n多题专家分析，试题“It is vital that every piece of equipment ________ before the experiment.A．is checked B．will be checkedC．be checkedD．must be checked…”主要考查了你对 【虚拟语气】，【情态动词】 等知识点的理解和应用能力。关于这些知识点的“档案”，你可以点击相应的链接进行查看和学习。
◎ 相似题
与“It is vital that every piece of equipment ________ before the experiment.A．is checked B．will be checkedC．be checkedD．must be checked”考查相似的试题有：
