---Go and ask the waiter how much_____. ---Don’t worry. It has been _____.

A．does the meal cost, paid for　　 B．the meal costs, paid
C．the meal spends, paid D．the meal costs, paid for

选B
四个选项里只有C用的是spend 所以第一个排除它，所以前半句的考点不管了，后半句来看ABD只有B不一样 所以就选它了。
当然 正确解释是这样，spend是人作主语，cost才是物作主语，如果用paid for那后面是要接宾语的

go and ask the waiter how much the meal costs. don't worry.it has been ------. 选a 解释为已经支付了 如果是b的话，后面要加具体的东西的 比如pay for the bill 有不会的可以再问我

答案是D Go and ask the waiter how much (the mean costs). 去问一下服务员，这顿饭多少钱。 这里后面是宾语从句，因此要用正常语序 Don't worry. It has been (paid for). 这里是固定用法 已经有人付过了