YOU SAID:

I wonder what they're up to

INTO JAPANESE

私は彼らが何をしているのか疑問に思う

BACK INTO ENGLISH

I wonder what they're doing

INTO JAPANESE

今どうしてるかな？

BACK INTO ENGLISH

Wonder what they're doing now.

INTO JAPANESE

今どうしてるかな？

BACK INTO ENGLISH

Wonder what they're doing now.