B___ they go to the farm after class,it t__ them the whole afternoon to pick cucumbers and dig sweet potatoes.
问题描述：
B___ they go to the farm after class,it t__ them the whole afternoon to pick cucumbers and dig sweet potatoes.
答
（Before） they go to the farm after class,it （takes） them the whole afternoon to pick cucumbers and dig sweet potatoes.
句意：在课后去农场之前,他们花了整个下午的时间去摘黄瓜、挖红薯.
时态根据pick,应该是用的一般现在时,用第三人称单数.