Because he doesn't know whom to talk with.

因为他不知道该和谁说话。

youdao

“I no longer know whom to believe,” Mr Gogov confessed this week. “Russia says one thing, Ukraine says another.

本周谷谷维坦承到：“我不知道该相信谁，俄罗斯和乌克兰的说法完全不一致。”

youdao

How can anyone know whom to trust?

怎能知道该去相信谁？

youdao

Second, the small group of voters -- all of whom know each other -- makes it impossible for an outsider to affect the voting in any way.

CNN: How secure is the papal election?

According to the Financial Times report, Janus Friis and our man Niklas Zennstrom -- whom you may know from a little company called Skype -- are supposedly developing a peer-to-peer IPTV service with the intention of distributing video online the same way Skype and its P2P approach distributed VoIP calling online.

ENGADGET: Skype founders to launch P2P IPTV for millions of people?

Her friends and her boyfriend joined the search on Tuesday along with coach loads of local people - many of whom did not know the missing woman - after a police appeal for help.

BBC: Dog teams to join search for missing Sian O'Callaghan