等到水管工来的时候，我已经忍无可忍了。

By the time the plumber arrived, I ___was ___at ___the ___end ___of my ___tether.

经历了数月难以承受的压力后，她终于到达了忍耐的极限。

After months of unbearable stress, she finally ___reached ___the ___end ___of her ___tether.

工作中的持续压力意味着我正迅速接近忍耐极限。

The constant pressure at work means I'm rapidly approaching ___the ___end ___of my ___tether.