_____, its resistance would be increased.
A. The wire has a smaller diameter
B. Was the wire of a smaller diameter
C. Were the wire of a smaller diameter
D. A smaller diameter the wire has
此题考查虚拟语气和倒装。句意:电线的直径越小,其电阻越大。本句为省略了if的虚拟语气,省略后需要倒装。本句可还原为:If the wire were of smaller diameter, its resistance would be increased. if引导的虚拟语气中,be动词只能用were不能用was。故本题答案为C。
考点:语法