Some of the children are deaf and others are [немые] .

dumb mute mutes

Info: The adjective "mute" gives rise to the (plural) noun "mutes".

[Ячмень] will grow further north than wheat.

barley barleycorn

Info: In BrE "corn" can mean "(all kinds of) grain", but "barley" is a more specific term.

Take the [лифт] to the 0th floor.

elevator lift

Info: For AmE, use "elevator", for BrE, use "lift".

[капли] of sweat broke out on the mayor's increasingly nervous face.

Beads drops

Info: Note that the "of" is required!

Mick was actually a pretty [осмотрительный] poker player.

cautious

Info: "Careful" is close, but not right, since it implies paying attention, not strategy.