there be 句型练习时出现的问题There ( )a set of keys in the table.括号里是填is还是填are?
问题描述:
there be 句型练习时出现的问题
There ( )a set of keys in the table.括号里是填is还是填are?
答
there be 句型练习时出现的问题
There ( )a set of keys in the table.括号里是填is还是填are?