Wǒ / men / běn / yǐ / wéi / zhè / xiàng / gōng / zuò / hěn / shùn / lì / shú / liào / zuì / hòu / hái / shi / chū / le / wèn / tí.

我们本以为这项工作很顺利，孰料最后还是出了问题。

We thought the work was going smoothly, but unexpectedly a problem arose in the end.