Translation of "クレームは来ていないので、よくできているということではないかと思います。" in English

クレームは来ていないので、よくできているということではないかと思います。

- I assume we're doing a pretty good job since no one has complained.
- I assume that we're doing a pretty good job since no one has complained.
- I assume that we're doing a pretty good job since nobody has complained.
- I assume we're doing a pretty good job since nobody has complained.