Three million tons of coal is exploited every year in the city,为什_英语解答

Three million tons of coal is exploited every year in the city,为什么用is不是应该用are

人气：221 ℃　时间：2020-05-06 20:17:33

解答

原因：coal煤炭是不可数名词,所以用单数形式is.前面的tons是修饰煤炭的.
例：There million litres of gas is used for this company.