I knew a new film ________(show) at the cinema while we were standing in line for tickets.用括号中所给动词的适当形式填空能不能用were being shown,请解释清楚原因,

问题描述:

I knew a new film ________(show) at the cinema while we were standing in line for tickets.
用括号中所给动词的适当形式填空
能不能用were being shown,请解释清楚原因,