英语主谓一致语法Three million tons of coal ______ every year in the city.

Question

1 Three million tons of coal （——） every year in the city.
A. is exploited B. are exploitedC. had exploited
D. have exploited
2 Ten thousand tons of coal （——） produced last year.
A was B were C is D are
谁能给个答案和详解？要详解哦！

Answer 1

B. are exploited 每一年 所以用一般进行时即可 还有就是被动语句 被开采
B were 去年 用过去式 主语是10000吨 用复数追问

我也是这样想的，但是第一题答案是A，他是这样解释的
主语为coal, 是不可数名词。根据题意，此处要用被动语态。